36results about How to "Overcoming aberrations" patented technology

The present invention relates to a laser differential confocal tomography focusing method and device, and relates to the technical field of optical imaging and detection. The method uses a rear pupilto block half of a measurement beam, uses a spectroscopic differential confocal detection system to detect the unblocked measurement beam, and uses an absolute zero point of a differential confocal response curve to achieve high precision tomographic focusing. The method organically combines a laser differential confocal technique and a ray tracing technique to establish a ray tracing and compensation model to eliminate influence among each fixed focal surface parameters, and achieves fast trigger of focus through data near a linearly fitting absolute zero point. The method can obtain the differential confocal response curve by using only one detector, and realizes the tomographic focusing through the absolute zero point of the differential confocal response curve, greatly simplifies system structure, in the same time, avoids error introduced by adjustment inaccuracy, and greatly improves precision of focusing. The method will provide a new technical approach to the field of confocal imaging / detection.

The invention discloses an optical image capture system, an image capture device and an electronic device. The optical image capture system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from an object side to an image side. The first lens has negative refractive power, and the image-side surface is concave near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power. The sixth lens has refractive power, the image-side surface is concave near the optical axis and contains at least one convex surface away from the optical axis, and both the object-side surface and the image-side surface are aspheric surfaces. The seventh lens has refractive power, the image-side surface is concave near the optical axis and contains at least one convex surface away from the optical axis, and both the object-side surface and the image-side surface are aspheric surfaces. When certain conditions are met, aberration is avoided. The invention further discloses an image capture device comprising the optical image capture system and an electronic device comprising the image capture device.

The invention relates to an optical imaging lens and an electronic device applying the optical imaging lens. The optical imaging lens comprises six lenses and is characterized in that an object side surface of the first lens is provided with a convex surface portion located in an area nearby the circumference; the second lens is made of plastic; an image side surface of the third lens is provided with a concave surface portion located in an area nearby an optical axis; the fourth lens is provided with a positive refractive index, an object side surface of the fourth lens is provided with a concave surface portion located in an area nearby the circumference, and an image side surface of the fourth lens is provided with a concave surface portion located in an area nearby the circumference; an image side surface of the fifth lens is provided with a convex surface portion located in an area nearby the optical axis; and an object side surface of the sixth lens is provided with a convex surface portion located in an area nearby the optical axis, and the sixth lens is made of the plastic. The electronic device comprises a casing and an image module, wherein the image module is installed in the casing and comprises the optical imaging lens, a lens cone, a module rear base unit and an image sensor. The optical imaging lens and the electronic device applying the optical imaging lens are enabled to have good practical performance, and thin and short structural design is facilitated.

The invention discloses a full-width camera lens of a digital camera. The full-width camera lens of the digital camera comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens sequentially from an object side, wherein the first lens is a spherical positive lens protruding towards the object side, the second lens is a spherical positive lens protruding towards the object side, the third lens is a spherical negative lens sinking towards the object side, the fourth lens is a spherical negative lens sinking towards the object side, the fifth lens is a spherical positive lens protruding towards the object side, the sixth lens is a spherical negative lens sinking towards the object side, and the seventh lens is a spherical positive lens protruding towards the object side. The full-width camera lens of the digital camera has a big field angle, a delicate appearance, and high cost performance.

The invention refers to a method for the spatially resolved introduction of an intensity pattern of electro-magnetic radiation by optic display system into a photosensitive substance (2) having properties which can be changed by photon exposure. These properties include a first, liquid and at least one second state, with the electro-magnetic radiation (4) being conducted via the optic display system (3) into the photosensitive substance and here being projected on predetermined spatial coordinates, in order to create at or in an area of these spatial coordinates a change of the properties of the substance. A surface (6) of an objective lens of the optic display system, through which the electro-magnetic radiation 4 is emitted, is immersed in the liquid photosensitive substance 2. A corresponding device is provided, and the device and method can be used for the creation of micro or nano-scaled structures.

The invention discloses a super-resolution imaging system comprising a femtosecond laser, a picosecond laser, a first data acquisition card, a second data acquisition card and a spatial light modulator. The dissipation light generated by the femtosecond laser and the exciting light generated by the picosecond laser are emitted to a sample and then a fluorescence signal is generated. The second data acquisition card converts the fluorescence signal into voltage information. The voltage information acts as the fitness value of a genetic algorithm. The voltage information is calculated accordingto the genetic algorithm and a maximum voltage absolute value is obtained, and a phase diagram corresponding to the maximum voltage absolute value acts as a phase compensation diagram. The phase compensation diagram is superposed on the dissipation light to perform aberration correction on the dissipation light so that the aberration introduced in the STED imaging process can be overcome, the imaging depth and the spatial resolution of the STED super-resolution imaging system can be enhanced and thus the super-resolution imaging system can be widely applied in physical medicine and other fields.

The invention relates to an optical lens. The invention discloses an optical imaging lens which includes an aperture, and first, second, third and fourth lenses in sequence from an object side to an image side along an optical axis, each lens has an object side face and an image side face, and the optical lens satisfies TTL / T4<=6.7 and ALT / T3<=3.6. The invention also discloses an electronic device which includes an enclosure, and an image module which is installed in the enclosure and includes the abovementioned optical imaging lens, a lens barrel, a module holder unit, a substrate and an image sensor. The optical imaging lens and the electronic device using the same are used for optical photography.

The invention discloses a terahertz imaging device and method. The terahertz imaging device comprises a collimation module, a masking module and a reflected wave acquisition module. The collimation module is used for collimating incident terahertz signals and then enabling the terahertz signals to irradiate the masking module and an object to be imaged. The masking module is used for covering the part in front of the object to be imaged to control the irradiation region, irradiated by the terahertz signals, of the object. The reflected signal acquisition module is used for acquiring the reflected terahertz signals obtained after object transmission and converting the reflected terahertz signals into electric signals to be sent to a signal processing module. The signal processing module is used for controlling the masking module to move and conducting object imaging according to the corresponding electric signals.

The invention discloses a polarization-sensitive broadband response long-wave infrared metamaterial absorber. The absorber comprises a broadband absorption metal periodic array structure, an intermediate dielectric layer and a polarization response metal periodic array structure. Electromagnetic radiation enters from the broadband absorption metal periodic array structure, thickness of the polarization response metal periodic array structure is larger than the attachment depth of a metal material of the polarization response metal periodic array structure in a target wave band, and TE polarization sensitive response is shown; or electromagnetic radiation enters from the polarization response metal periodic array structure and shows TM polarization sensitive response; and ultra-wideband polarization absorption response can be realized in a long-wave infrared range. Due to the fact that the polarization effect is good, broadband absorption efficiency is high, and the structure is simple, a new design thought is developed for designing the broadband polarization sensitive absorber. When the system is combined with an area array polarization detection system, infrared polarization detection can be realized without using optical elements such as a polaroid, aberration caused by the alignment problem between the polaroid and an imaging unit is avoided, an optical system is simplified, and the imaging quality is improved.

The invention provides a digital mirrorless camera large-aperture medium-format lens with an effective focal length f being 65 mm and an F-number F being 1.4. The digital mirrorless camera large-aperture medium-format lens comprises a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9),a tenth lens (10) and an eleventh lens (11) in sequence from an object side, wherein the eighth spherical surface is glued with the ninth spherical surface, the fourteenth spherical surface is gluedwith the fifteenth spherical surface, the eighteenth spherical surface is glued with the nineteenth spherical surface, and the twentieth spherical surface is glued with the twenty-first spherical surface. The 65 mm F 1.4 lens is a picture lens in a digital mirrorless camera large-aperture medium-format lens, and has the advantages of ultra-large aperture, exquisite appearance and extremely high cost performance.

The invention relates to a prime lens, in particular to a large-view-field low-distortion lens which can be applied to space and ground imaging. The invention aims to solve the technical problems of large distortion and serious stray halo of an existing large-view-field lens, provides a large-view-field low-distortion lens which is large in view field angle, small in distortion and good in imagingquality, and has high ground and space environment adaptability. The lens comprises a second negative lens, a third negative lens, a fourth negative lens, a fifth positive lens, a sixth positive lens, a seventh cemented lens group, an eighth positive lens and a ninth cemented lens group which are sequentially and coaxially arranged in the incident direction of light. The second negative lens andthe third negative lens form a reverse telephoto lens group, the fourth negative lens and the fifth positive lens form the front half part of the improved double-Gaussian lens group, the sixth positive lens and the seventh cemented lens group form the rear half part of the improved double-Gaussian lens group, and the eighth positive lens and the ninth cemented lens group form an emergent lens group. The fourth negative lens adopts an aspheric lens.

The invention discloses a bilateral misplaced differential confocal ultra-large curvature radius measurement method, belonging to the technical field of optical precision measurement. According to themethod, in a confocal measurement system, firstly, large and small virtual pinhole detection areas are set through software on an airy disk image detected at CCD and two confocal characteristic curves detected by the CCD are sharpened through subtraction treatment, then, bilateral misplaced differential subtraction is executed for the sharpened confocal characteristic curve so as to obtain a high-sensitivity differential confocal characteristic curve; secondly, based on a null point of the bilateral misplaced differential confocal characteristic curve and a focal point of the confocal measurement system are accurately corresponding to the characteristics, high-precision focus-fixed locating is executed for each characteristic position point in ultra-large curvature radius measurement, andconsequently, high-precision measurement of ultralong focal length. Compared with the existing large curvature radius measurement method, the method provided by the invention has the advantages, suchas high precision, high environment interference resistance and simple structure, and has wide application foreground in the technical field of optical precision measurement.

An optical imaging lens includes a first, a second, a third, a fourth, a fifth, and a sixth lens elements from an object side to an image side arranged in order along an optical axis. The six lens elements are the only lens elements having refracting power in the optical imaging lens. An optical axis region of an image-side surface of the second lens element is convex. An optical axis region of an object-side surface of the third lens element is concave. An optical axis region of an object-side surface of the fourth lens element is convex. The fifth lens element has positive refracting power, and an optical axis region of the object-side surface of the fifth lens element is concave. The optical imaging lens satisfies: V3−V6≥20,000. V3 is an Abbe number of the third lens element. V6 is an Abbe number of the sixth lens element.

The invention provides a diafocal point positioning-free type dual-ellipsoid imaging device and belongs to the technical field of optical imaging. The imaging device comprises two sets of coaxially and oppositely arranged identical ellipsoidal reflecting systems. Each ellipsoidal reflecting system is composed of a fixed disc, an objective lens, an objective lens adaptor, an ellipsoidal reflecting mirror and a fixed sleeve, wherein the above parts are coaxially arranged. The fixed disc is arranged inside the fixed sleeve. The center of the fixed disc is provided with a threaded hole. The objective lens adaptor for fixing the objective lens is in threaded connection with the threaded hole. Through the rotation of the objective lens adaptor inside the threaded hole, the objective lens can move along an optical axis, so that the focal point of the objective lens coincides with the far focal point of the ellipsoidal reflecting mirror. The near focal point of the ellipsoidal reflecting mirror is simultaneously located on the end surface of the ellipsoidal reflecting mirror and the end surface of the fixed sleeve. According to the technical scheme of the invention, based on the design of a special mechanical structure, the spatial three-dimensional measurement step during the installing and adjusting process of the ellipsoidal reflecting mirror is avoided. meanwhile, the imaging device is simple to install and adjust, high in efficiency, and theoretically aberration-free.

The invention relates to a digital micro-single camera lens, and especially relates to an M-port digital micro-single camera super-large aperture full-width lens with effective focal length f being 50mm and relative aperture F being 0.95. The lens sequentially comprises a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5), a sixth lens (6), a seventh lens (7),an eighth lens (8), a ninth lens (9), a tenth lens (10) and an eleventh lens (11) from an object side. The lenses all adopt spherical design to correct various aberrations, spherical aberrations generated by adopting spherical mirrors can also be avoided, the structure is simplified, and the imaging quality is improved. The lenses are all made of glass materials produced by the Chengdu Luminescent Photoelectric Co., Ltd., so that the quality of the lenses and the definition of the lens are improved, the use performance of the lens is improved, and the cost performance of the lens is greatly improved.

The invention provides a 1-5x zoom digital camera full frame macro lens. The lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens in order from the object side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the eleventh lens and the twelfth lens are all glass materials produced by Chengdu Bright Optoelectronics Co., Ltd. The 1.5x zoomdigital camera full-frame macro lens has the advantages that all the lenses are spherical surfaces, which corrects various aberrations; spherical aberrations caused by spherical lenses can be avoided;the structure is simplified; the imaging quality is improved; the shooting distance is increased; all the lenses are made of glass, which improves the quality of the lenses and the sharpness of the lens; and the use performance of the lens is improved.

The invention discloses an image pick-up camera, an image capture device and an electronic device. The image pick-up camera comprises a diaphragm, a first lens with positive refractive power, a secondlens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power which are sequentially distributed from an object side to an image side; the image side surface of the first lens is a concave surface at the optical axis of the camera and a convex surface at the circumference of the camera; the image side surface of the fourth lens is a convex surface at the optical axis; the image side surface of the fifth lens is a concave surface at the optical axis; and at least one of the object side surface and image side surface of the fifth lens has at least one inflection point. The image pick-up camera satisfies the relational expression that 1<R4 / f<1.5, wherein R4 is the curvature radiusof the image side surface of the second lens, and f is the effective focal length of the image pick-up camera. The image pick-up camera has reasonable lens configuration and meets the relational expression 1 that 1<R4 / f< 1.5, and therefore, aberration can be avoided, high-order aberration generated by the second lens can be corrected, and imaging quality is improved.

The invention discloses an extra-large aperture full-width lens of a digital single-lens reflex camera. The specification of the extra-large aperture full-width lens of the digital single-lens reflex camera is 85 mmf1.2. The lens sequentially comprises a first lens body, a second lens body, a third lens body, a fourth lens body, a fifth lens body, a sixth lens body, a seventh lens body and an eighth lens body from the object space. The first lens body, the second lens body, the third lens body, the sixth lens body and the eighth lens body are respectively a spherical surface plus lens body protruding towards the object space, the fourth lens body is a spherical surface plus lens parallel to the object space, and the fifth lens body and the seventh lens body are respectively a spherical minus lens concaving towards the object space. The full-width lens of the digital single-lens reflex camera is of a medium focus length, and is extra large in aperture, delicate in appearance and extremely high in cost performance.