59results about How to "Improve Optical Imaging Quality" patented technology

A lens adapted to image a first image plane at a reduced side onto a magnified side is provided. The lens has an optical axis. The lens includes a lens group and a concave reflective mirror. The lens group is disposed in the light path between the reduced side and the magnified side. The concave reflective mirror is disposed in the light path between the lens group and the magnified side. The offset of the first image plane with respect to the optical axis is greater than 100%. The throw ratio of the lens is less than 0.3.

An HMD device is provided, comprising an image element for generating an image and imaging optics projecting the image such that it is perceivable by a user wearing said HMD device, wherein said imaging optics comprise a first optical group including a first lens, which has negative refractive power, and a second lens, which has positive refractive power, a deflecting element arranged following the first optical group as well as a second optical group following the deflecting element, said second optical group comprising a third lens, and wherein, for correction of astigmatism and distortion, at least one surface of the first and second lenses is aspheric and, for correction of the spherical aberration, at least one surface of the third lens is aspheric.

A lens adapted to image a first image plane at a reduced side onto a magnified side is provided. The lens has an optical axis. The lens includes a lens group and a concave reflective mirror. The lens group is disposed in the light path between the reduced side and the magnified side. The concave reflective mirror is disposed in the light path between the lens group and the magnified side. The offset of the first image plane with respect to the optical axis is greater than 100%. The throw ratio of the lens is less than 0.3.

A lens adapted to image a first image plane at a reduced side onto a magnified side is provided. The lens has an optical axis. The lens includes a lens group and a concave reflective mirror. The lens group is disposed in the light path between the reduced side and the magnified side. The concave reflective mirror is disposed in the light path between the lens group and the magnified side. The offset of the first image plane with respect to the optical axis is greater than 100%. The throw ratio of the lens is less than 0.3.

The invention discloses an unblocked adaptive varifocal optical system and a calibration method thereof. The system conducts varifocal control by deformable mirrors; a Shack-Hartmann wavefront sensor in the system is connected with an adaptive control system assembly; the adaptive control system assembly is connected with two or more deformable mirrors; target light sequentially passes through each deformable mirror to enter an imaging lens assembly; a part of converged target light enters an imaging camera through a spectroscope for imaging; another part of the converged target light is reflected by the spectroscope to enter a first collimating lens through a field stop, and collimated to parallel light to enter the Shack-Hartmann wavefront sensor; image point data is measured; and the adaptive control system assembly revolves wave aberration according to the image point data and operates a corresponding correction signal, and controls at least one deformable mirror to correct the wave aberration of the system. The system is simple in structure, convenient to adjust, and high in imaging quality.

The invention relates to a living fingerprint capturer comprising an optical fingerprint imaging module and a fingerprint signal processing module, wherein the optical fingerprint imaging module comprises a light source, a prism, an imaging objective lens and an image sensor module which are arranged along an optical path; the image sensor module comprises an image sensor; the prism is a pentaprism comprising a sampling surface and an illuminating surface which are mutually parallel and over against as well as an imaging surface opposite to the imaging objective lens, and the rest surfaces of the pentaprism are all coated with shading layers; the light source is arranged below the illuminating surface of the pentaprism; and a diffusion membrane is arranged between the illuminating surface of the pentaprism and the light source. The invention has the advantages of good optical imaging quality, low false alarm rate, overall automatic induction control, and the like.

The invention discloses a lens module, which consists of four optical lenses. The lens module comprises a first optical lens group and a second optical lens group. The first optical lens group comprises first optical lenses with negative diopter. Each first optical lens is provided with a first surface and a second surface, wherein the first surface faces an amplification side; the second surface faces a reducing side; at least one of the first surface and the second surface is a non-spherical surface. The second optical lens group is configured between the first optical lenses and the reducing side, and moreover, the second optical lens group comprises second optical lenses, third optical lenses and fourth optical lenses which are arranged in sequence from the amplification side to the reducing side. The diopter of the second optical lenses, the diopter of the third optical lenses and the diopter of the fourth optical lenses are positive, negative and positive in sequence, and moreover, at least two of the second optical lenses, the third optical lenses and the fourth optical lenses respectively comprise non-spherical surfaces. Moreover, the effective focal length of each third optical lens is f3, and the refractive index is Nd3, whereas the effective focal length of each fourth optical lens is f4. Moreover, the lens module meets the formula as follow: the absolute value of f3 / (f4*Nd3) is greater than 0.45 but is less than 1.2.

The invention provides a magnification regulating method of a projection optical system. The method comprises the following steps: firstly, providing a projection optical system, wherein the projection optical system comprises a front group, an aperture diaphragm and a rear group along the optical axis direction; the front group comprises a first glass group, a second glass group and a third glass group, wherein the first glass group and the third glass group have positive refractive powers, and the second glass group has negative refractive power; the rear group comprises a fourth glass group, a fifth glass group and a sixth glass group, wherein the fourth glass group and the sixth glass group have positive refractive power, and the firth glass group has negative refractive power; the front group and the rear group are in symmetry about the aperture diaphragm, and meanwhile, a group of lenses in symmetry in the third glass group and the fourth glass group are moved, and the projection magnification of the optical system can be regulated conveniently and effectively.

The invention relates to an alignment observation device which is applied to an exposure machine, in particular to a field-splitting microscope for realizing a rapid zooming function of an object lens. The field-splitting microscope consists of an object lens rapid-zooming device, an object lens system, an eye lens system and the like. The field-splitting microscope has the beneficial effects that the original field-splitting microscope is taken as a prototype, the operating distance of the lens and the distance between an eye-point exit pupil position and a working face are unchanged, the distance between the object lens and a reflector is increased, an object lens rapid-zooming mechanism is additionally arranged at the mounting position of the object lens, and the rotation part of the zooming mechanism is set into the form that the object lens locating surfaces of a lower turntable are positioned on the same horizontal plane; optimization design is carried out on an illumination system, and illuminating light and imaging light in a new light path are independently propagated in the horizontal direction; a steering structure of the light path is changed from an upright shape to a turning shape; and an eye-distance adjusting structure for the lens is changed from a straight-pull light-splitting structure to a rotary light-splitting structure. By utilizing the field-splitting microscope, the rapid zooming function of the object lens can be realized in the case of switchover between coarse alignment and fine alignment.

The invention discloses an optical lens and imaging equipment. The optical lens sequentially comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis; the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface near the optical axis, and the image side surface of the second lens is a concave surface near the optical axis; the third lens has positive focal power, and the object side surface of the third lens is a convex surface near the optical axis; the fourth lens has negative focal power, the object side surface of the fourth lens is a convex surface near the optical axis, and the image side surface of the fourth lens is a concave surface near the optical axis; the fifth lens has positive focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens has negative focal power; and the first lens is a glass aspheric lens, and the other lenses are plastic aspheric lenses. The optical lens has the advantages of being large in aperture, large in imaging target surface, high in pixel, capable of meeting the requirement for grouping adjustability of the AA technology and high in yield.

The invention is directed to a coaxially arranged, off-axis optical system for a sighting device or aiming device. It is the object of the invention to provide a possibility for constructing an optical system in such a way that the typical disadvantage with respect to the tightness of a sighting device in an open-type construction is overcome and a good flattening of the image field is achieved in addition to the high optical imaging quality of the aiming mark. According to the invention, by means of a coaxially arranged, off-axis optical system for a sighting device or aiming device comprising a lens group, wherein the lens facing the target object is constructed as a converging meniscus and the lens facing the eye is constructed as a diverging meniscus, with a dichroic reflector and an embodiment for the aiming mark, the above-stated object is met in that a correction lens with positive refractive power is arranged at a distance of less than 0.2-times the focal length relative to the aiming mark and acts exclusively in the beam path of the aiming mark, and in that the correction lens is inserted into the housing by positive locking and is sealed so that the housing with the aiming mark, with the associated mechanism and with the electronics in the interior is sealed relative to the environment.

There is provided a method for optimizing wavelength selection for multiwavelength optical data acquisition of chromophores in a turbid medium. The optimization is based on the minimization of a criterion based on the variance matrix of chromophores estimate features. The method can advantageously be used to obtain physiological information from biological tissue.

Disclosed is a micro-lens imaging multi-well test plate which comprises: a transparent plate of 3-5 mm in thickness with one or more trapezoidal wells locating in the middle of the plate, each of the wells is of an underside of 2-4 mm in diameter, 0.2-0.5 mm in thickness, a trapezoidal dip angle of 60-75°, and has a micro-lens which upper half is hemispherical, lower half is a cylinder, with radius of 0.1˜1.0 mm, height of 0.2˜2.5 mm, molded on the bottom of the well. The micro-lens imaging multi-well test plate is made of homogeneous optical transparent materials. When the trapezoidal concave wells of the test plate are filled with fluid to immerse the micro-lens, under parallel light illumination, due to the refraction effect of light, the image of micro-lens is a round one with an outer edge that is a black ring. The outer radius R of the black ring is the radius of the micro-lens, the inner radius r of the black ring is a function of the refractive index n1 of the immersion liquid, the refractive index n2 of the micro-lens and the height h of the micro-lens, so the refractive index of the sample fluid can be determined by monitoring the value of the inner radius r of the black ring with known values of R, n2 and h. By using a multi-well test plate for imaging, the individual refractive indices of different sample fluids in all the wells can be determined simultaneously in one measurement.

An optical system including a photo sensor, a wafer level optical (WLO) lens module and a focusing motor is provided. The WLO lens module is located at the photo sensor. The WLO lens module includes at least one transparent substrate and at least one lens, wherein the lens is disposed on the transparent substrate. The focusing motor is located between the WLO lens module and the photo sensor. The focusing motor drives the WLO lens module to move toward or backward the photo sensor.

A micro video camera lens system consists of shutter and meniscus shaped thick lens with its concave surface towards to objective side and its convex surface towards to imaging surface. It is featured as using no spherical surface as surface towards to objective side and using convex surface with diffraction grating as surface towards to imaging surface, applying condition formula of ( 1 ) 0.1ú“R2 / R1 ú“0.5 for said system whether R1 ¿C curvity of surface top near to objective side and R2 ¿C curvity of surface top near to imaging surface.

The invention provides a projection optical device combining augmented reality and glasses. The device comprises a visual spectacle lens part and an augmented reality optical system part, wherein theeyesight glasses comprise two surfaces, one of which has a fixed curvature shared by the augmented reality optical system, and the other has an adjustable curvature, and by adjusting the curvature, myopia and hyperopia lenses with different degrees can be obtained; and the augmented reality optical system comprises six spherical surfaces, two aspherical surfaces and three free curved surfaces, thefirst spherical surface is shared with the first fixed curvature surface of the spectacle lens. Through the superposition of the glasses and the augmented reality optical system, the functions of glasses and augmented reality display can be realized simultaneously.

The invention relates to the technical field of virtual image imaging systems and discloses a virtual image imaging system with an anti-peep film. The system comprises an image source module, a lens in the imaging system, an observer position, a light trajectory, an outgoing light and an anti-peep film. Imaging light emitted by the image source module is reflected by a lens in the imaging system and the light trajectory is imaging light; and the light trajectory is reflected to the observer position by the lens in the imaging system. The image source module includes outgoing light. According to the invention, with the anti-peep film, the image source light is filtered partially by using the film with the anti-peep property, so that the outgoing light direction is controlled and thus the stray light emitted by the image source module is blocked; and thus the direction of the outgoing line of the image source is limited and the outgoing light is filtered. Therefore, special requirementson the incident light, the outgoing line, and the external interference light can be met; and the optical imaging quality of the whole system is improved.

Disclosed is a micro-lens imaging multi-well test plate which comprises: a transparent plate of 3-5 mm in thickness with one or more trapezoidal wells locating in the middle of the plate, each of the wells is of an underside of 2-4 mm in diameter, 0.2-0.5 mm in thickness, a trapezoidal dip angle of 60-75°, and has a micro-lens which upper half is hemispherical, lower half is a cylinder, with radius of 0.1˜1.0 mm, height of 0.2˜2.5 mm, molded on the bottom of the well. The micro-lens imaging multi-well test plate is made of homogeneous optical transparent materials. When the trapezoidal concave wells of the test plate are filled with fluid to immerse the micro-lens, under parallel light illumination, due to the refraction effect of light, the image of micro-lens is a round one with an outer edge that is a black ring. The outer radius R of the black ring is the radius of the micro-lens, the inner radius r of the black ring is a function of the refractive index n1 of the immersion liquid, the refractive index n2 of the micro-lens and the height h of the micro-lens, so the refractive index of the sample fluid can be determined by monitoring the value of the inner radius r of the black ring with known values of R, n2 and h. By using a multi-well test plate for imaging, the individual refractive indices of different sample fluids in all the wells can be determined simultaneously in one measurement.

An optically transparent dielectric reflector (200) that reflects an incident millimeter-wave beam at a design frequency. The reflector (200) includes layers of different optically transparent dielectric materials. The thickness of the individual layers is chosen so that the transmitted waves cancel almost completely in the forward direction, yielding a high degree of transmission loss and substantial reflection. In the preferred embodiment, the invention is comprised of alternating layers of optical sapphire and air. In the best mode, there are seven sapphire layers, with outer sapphire layers (50) having a nominal thickness of 70.8 mils, inner sapphire layers (52) with a nominal thickness of 30.4 mils, and air layers have a nominal thickness of 32.0 mils Vented metal spacers (54) are used to maintain optimal thickness of air layers.

Apparatus for inspecting objects especially masks in microlithography that are disposed in a vacuum chamber. The apparatus includes a converter for converting illuminating radiation emitted from the object into a radiation of a higher wavelength. A sensor for recording images is disposed outside the vacuum chamber and arranged as an optical interface from the vacuum chamber to the sensor of the converter or at least one part of an image lens is arranged as a window in the vacuum chamber.

An optical zoom system including a photo sensor, a wafer level optical (WLO) lens module and a focusing motor is provided. The WLO lens module is located at the photo sensor. The WLO lens module includes at least one transparent substrate and at least one lens, wherein the lens is disposed on the transparent substrate. The focusing motor is located between the WLO lens module and the photo sensor. The focusing motor drives the WLO lens module to move toward or backward the photo sensor.

A fixed focal length lens including a first lens group, a second lens group, and a third lens group arranged in sequence from a magnified side towards a reduced side is provided. The first lens group has a positive refractive power, and includes a first lens and a second lens arranged in sequence from the magnified side towards the reduced side. Refractive powers of the first lens and the second lens are respectively negative and positive. The second lens group has a positive refractive power, and includes a third lens, a fourth lens, and a fifth lens arranged in sequence from the magnified side towards the reduced side. Refractive powers of the third lens, the fourth lens, and the fifth lens are respectively positive, negative, and positive. The third lens group has a positive refractive power, and includes a sixth lens. A refractive power of the sixth lens is positive.

The invention provides a fusion imaging device of two-dimensional sonar and laser distance gating imaging equipment. The fusion imaging device is characterized by comprising a sealed cabin, an image function enhancing camera, two-dimensional multi-beam sonar equipment, a watertight plug, a lithium battery, an embedded computing hardware platform, a short pulse laser, a helmet display and a two-dimensional adjusting frame. The method has the advantages that 1) the influence of underwater backward scattered light is effectively reduced by adopting laser distance gating imaging equipment, and theoptical imaging quality is greatly improved; 2) a two-dimensional adjusting frame is arranged to facilitate adjustment of view field center positions of the image function enhancing camera and the two-dimensional multi-beam sonar equipment, and a diver can manually remotely control the light beam emitting direction of the auxiliary laser light source, so that an optical image can be convenientlyand rapidly obtained after the acoustic image obtains the position of a target; 3) the structure is simple and practical and can be used as a guiding and collision device for underwater divers, and 4)the overall structure is good in bearing performance and water tightness and high in engineering application feasibility.

Lenses and methods are provided for improving peripheral and / or central vision for patients who suffer from certain retinal conditions that reduce central vision or patients who have undergone cataract surgery. The lens is configured to improve vision by having an optic configured to focus light incident along a direction parallel to an optical axis at the fovea in order to produce a functional foveal image. The optic is configured to focus light incident on the patient's eye at an oblique angle with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees. The image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location. The method for improving vision utilizes ocular measurements to iteratively adjust the shape factor of the lens to reduce peripheral refractive errors.

The invention provides an HMD projection display optical system. From an object side to an eye side, the HMD projection display optical system comprises an Lcos, a PBS prism, a first prism and a second prism, wherein the second prism is a convex surface prism, one face is a convex spherical surface, and an inclined surface opposite to the convex spherical surface is coated with a semi-reflecting semi-transmitting film; the second prism is gummed with an inclined surface of the first prism through the semi-reflecting semi-transmitting film; light generated by a light source at one surface penetrates through the PBS prism and then irradiates the Lcos to generate an image, and the light of the image sequentially realizes reflection through the PBS prism, transmission of the first prism, reflection of the convex spherical surface and reflection of the semi-reflecting semi-transmitting film and then enters the eye; the outside scene above the first prism transmits through the first prism and the second prism and enters the eye. The HMD projection display optical system has advantages of simple and compact structure, small prism thickness, small volume, light weight and high optical imaging quality.

A supporting element includes a light-shielding portion and a supporting portion connected to the light-shielding portion. The light-shielding portion has a first surface, a second surface, a first inner-side connecting surface, and a first outer-side connecting surface. The first inner-side connecting and outer-side connecting surfaces connect the first and second surfaces, and face toward the inside and outside of the supporting element respectively. The first surface and the second surface are curved surfaces, and the first inner-side connecting surface further includes a first light-shielding surface adjacent to the first surface. The supporting portion has a third surface, a fourth surface, a second inner-side connecting surface, and a second outer-side connecting surface. The second inner-side connecting surface and the second outer-side connecting surface connect the third and the fourth surfaces, and face toward the inside and outside of the supporting element respectively. Furthermore, a portable optical imaging lens is also provided.

A lens including a filter, an aperture stop, and a lens set sequentially arranged along a first direction is provided. The filter includes a central region and a peripheral region. The central region has a first light transmission band for a wavelength range of a visible light and a second light transmission band for a wavelength range of an infrared light. The peripheral region surrounds the central region. The peripheral region has a third light transmission band for the wavelength range of the infrared light and is substantially opaque to the visible light, and an area of one portion of the central region surrounded by the peripheral region is tapered toward the first direction.