37 results about "Lens space" patented technology

The optical rotary adapter is used with an optical tomographic imaging system for acquiring an optical tomographic image of an object under measurement. The adapter includes a fixed sleeve, a stationary optical fiber supported by the fixed sleeve and having an inclined end face, a stationary collimating lens spaced a given distance from the inclined end face, a mounting cylinder carried rotatably with respect to the fixed sleeve, a rotary optical fiber mounted to the mounting cylinder and having an inclined end face, a rotary collimating lens mounted to the mounting cylinder and disposed with a given distance from the inclined end face, and a rotation actuating device for rotating said mounting cylinder. The central axes of the stationary and rotary optical fibers are offset from or inclined with respect to a central axis of rotation of the mounting cylinder to reduce attenuation of returning light from the object.

The invention discloses a VR (Virtual Reality) pupillary distance regulation method and device. according to a human eye image, the center point position information of each human eye pupil is determined; the center point position information of each human eye pupil and the lens optical axis position information of VR equipment are subjected to position information matching; when the center point position information and the lens optical axis position information are not matched, the lens space of the VR equipment is regulated; and therefore, the lens optical axis position of the VR equipment and the center point position of the human eye pupil are matched. Therefore, the method is an automatic pupillary distance adaptive regulation scheme capable of combining software, hardware and structures, the human eye pupil is automatically identified, and the human eye pupillary distance is calculated; in addition, according to the human eye pupillary distance, a VR lens optical axis space is automatically regulated, and an identical matching state of the lens optical axis space and the pupillary distance is achieved; and the lens optical axis space can be objectively, quickly and accurately regulated according to different human eye pupillary distances, and the experience degree of the user is greatly improved.

The invention relates to a method for realizing zoom optical system without moving a lens group and the optical system. The method comprises the following steps: firstly determining an object distanceA, a lens spacing B, a rear cut-off distance C and a group system focal distance f'; taking liquid varifocus lenses as a core element and carrying out model selection of the optical system; calculating and selecting applicable magnification Beta and determining the surface curvature radius of the two liquid lenses to finish the original structural design; carrying out aberration optimization anddetermining controlled variable of air pressure or hydraulic pressure to realize system zoom. The system comprises a system object plane and a system image plane, wherein at least two liquid varifocuslenses are arranged on the system object plane and the system image plane. The invention has the advantages of small volume, simple structure and high imaging quality, thereby particularly being suitable for occasions with severe requirement on structure and imaging quality.

The present invention discloses a large-field unit-magnification projection optical system. The optical system includes an optical axis, a spherical concave reflection mirror; a lens group with positive refracting power arranged adjacent the mirror with an air space therebetween. The lens group includes a first plano-convex lens, a negative meniscus lens adjacent the plano-convex lens, a positive lens adjacent the negative meniscus lens, a negative double-convex lens spaced apart far from the positive lens, and a second plano-convex lens. The optical system further includes a pair of prisms each having respective first and second surface. The second surfaces are arranged adjacent the flat surface of the plano-convex lens element on opposite sides of the optical axis and the first surfaces are arranged adjacent object planes and image planes, respectively. Each lens in the lens group and the pair of prisms provide chromatic aberration correction in a spectral region that contains at least g, h and i-line wavelengths. In this projection optical system, the object plane is parallel to the image plane.

An image sensor module includes a holder and a lens unit attached in the holder. The lens unit is held in the holder by at least one engagement projection formed by plastically deforming a part of the holder. Preferably, the lens unit includes a first lens spaced from the engagement projection and a second lens adjoining the engagement projection. Each of the first lens and the second lens includes a central lens portion, and a flat peripheral portion surrounding the lens portion. The flat peripheral portion of the first lens is held in contact with the flat peripheral portion of the second lens. The engagement projection engages the flat peripheral portion of the second lens.

The invention provides a device for testing absolute spectrum transmittance and uniformity thereof of an off-axis multi-lens space camera, belongs to the field of space optics, and aims at solving the problem of the off-axis multi-lens space camera that only the average transmission in a broadband is tested, or the transmission at some single wavelength position is tested, and the transmission of each wavelength position in the whole band cannot be tested. The device is characterized in that an all-band collimated radiating lighting source is fixed on a precise moving guide rail; the radiating light emitted by the all-band collimated radiating lighting source can be adjusted to be parallel to an optical axis of an optical system of the off-axis multi-lens space camera and then is imaged on a focus plane after passing through the optical system; an absolute spectrum radiation receiver is fixed the precise moving guide rail; an light inlet of the absolute spectrum radiation receiver can be adjusted to be reach the focus plane; a main control computer sends a control instruction to a controller, the controller controls the precise guide rail to drive the all-band collimated radiating lighting source to move, and the precise guide rail drives the absolute spectrum radiation receiver to move, so as to test the spectrum radiation quantity at different positions in the length direction of the focus plane.

A display apparatus has an image generator that generates image-bearing light from a surface and a lens spaced apart from the image generator and having an aspheric incident refractive surface concave to the image generator and having an aspheric reflective surface concave to the image generator, wherein a principal axis of the reflective surface is normal to the image generator. A beam splitter plate disposed in free space between the image generator and the lens has first and second parallel surfaces that are oblique to a line of sight of a viewer. The lens and the beam splitter plate define a viewer eye box for the image-bearing light along the line of sight of the viewer.

The application discloses three-dimensional image acquisition equipment and method. The three-dimensional image acquisition equipment comprises a first lens module, a second lens module, adjustable mechanisms separately connected with the first lens module and the second lens module, and a processing device that is connected with the first lens module and the second lens module, wherein the lens distance between the first lens module and the second lens module can be adjusted through the adjustable mechanisms; and the processing device is used for detecting the current lens spacing between the first lens module and the second lens module, determining an acquisition range corresponding to the current lens spacing, and using the first lens module and the second lens module to acquire a three-dimensional image for a shooting target when detecting that the distance between the image acquisition equipment and a target acquisition object is in the acquisition range. According to the three-dimensional image acquisition equipment and method disclosed by the application, the acquisition range of the three-dimensional image acquisition equipment can be expanded.

The present invention discloses a left and right mobile focusing lens comprising a basic lens and further comprising a radial lens assembly arranged at the front portion of the basic lens. The left and right mobile focusing lens changes the way of setting the lens assembly in the axial direction by the setting of the radial lens assembly, so that the increased lens is moved closer to the center of the lens from the side of the lens and the purpose of focusing is achieved, thereby effectively shortening the length of the lens and reducing the lens space occupied.