43 results about "Image-forming optical system" patented technology

An imaging optic (23) serves to image an object field arranged in an object plane, in which a lithography mask can be arranged as the object to be imaged, with imaging light via an imaging beam path into an image field arranged in an image plane, in which a substrate onto which the image is to be formed can be arranged. The imaging optic (23) has at least one correction device (32). This device has a correction element (30) arranged in the imaging beam path, the imaging effect of which varies across the image field. Furthermore, the correction device (32) has a correction element holder (33) and a correction element drive unit (34). The correction element holder (33) is driven by the correction element drive unit (34) during an imaging phase of the imaging optic (23) and can be displaced along a correction element displacement direction (35) extending transversely to the imaging beam path.The result is an imaging optic whose imaging effect is improved to achieve a predetermined imaging result.

A fundus imaging device has a fixation optical system, an OCT optical system, an imaging optical system, and a controller. The controller is configured to acquire a focus evaluation value based on a slit image formed by slit-shaped illumination light on a two-dimensional imaging element of the imaging optical system in a case where an optical scanner of the imaging optical system deflects in a predetermined direction. The controller is configured to perform diopter correction control of the OCT optical system by driving a first focus adjustment unit of the OCT optical system based on the focus evaluation value.

A UV-laser-based system (UVL-LVC system) for correcting the impaired vision of a patient's eye has a UV-laser source, which emits laser radiation to treat the patient's eye, and imaging optics for focusing the laser radiation onto the cornea of the patient's eye. The imaging optics allow a detection of a reflection of radiation, which is emitted onto the cornea of the patient's eye with the imaging optics and is at least partly reflected by the cornea of the patient's eye back into the imaging optics at an acceptance angle χMax of at least 2.5°. Additionally a method for centering a UVL-LVC system is disclosed.

An imaging optical system includes an infrared light absorbing element, an infrared light reducing film and a plate element in order along a paraxial path. The infrared light absorbing element is made of an infrared light absorbing plastic material, and the infrared light absorbing element is configured to refract a light. The infrared light reducing film is closer to an image surface of the imaging optical system than an incident surface of the infrared light absorbing element to the image surface of the imaging optical system. The plate element is disposed between the infrared light reducing film and the image surface, the plate element includes a translucent portion, a holder portion and a taper structure coating. The taper structure coating is disposed on at least one of an incident surface and an exit surface of the translucent portion.

An imaging optical system, camera module, and electronic device are disclosed. The imaging optical system sequentially includes an infrared light-absorbing element, an infrared light-reducing film, and a flat panel element along a central optical path. The infrared light-absorbing element is an infrared light-absorbing plastic element used to refract light. The infrared light-reducing film is positioned closer to an imaging surface of the imaging optical system than an incident surface of the infrared light-absorbing element. The flat panel element is integrally formed and disposed between the infrared light-reducing film and the imaging surface. The flat panel element includes a light-transmitting portion and a support portion, wherein the light-transmitting portion is correspondingly disposed to the imaging surface, and the support portion surrounds the light-transmitting portion, keeping the light-transmitting portion at a specific position on the central optical path. This improves optical quality.

A lens barrel includes a lens barrel main body that holds an imaging optical system, a first operation member that is provided around the lens barrel main body and adjusts an optical function of the imaging optical system, and a second operation member that is provided around the lens barrel main body and varies a degree of adjustment of the optical function by the first operation member. The second operation member is provided near the first operation member.

An imaging optical system for imaging at least one light source (1) onto at least one light-sensitive sensor (4), wherein the imaging optical system comprises at least one optical aperture (2), at least one beam-forming optical element (3), and at least one light-sensitive sensor (4), wherein the at least one beam-forming optical element (3) is a plano-concave cylindrical mirror, in particular a plano-concave cylindrical mirror.

To provide an image forming optical system which has various adjustment mechanisms and holds high optical performance in which various aberrations accompanying a wide angle are satisfactorily corrected, a projection type display device equipped with the image forming optical system, and an imaging device equipped with the image forming optical system.SOLUTION: Disclosed is an image forming optical system capable of forming an image on a reduction-side conjugate plane as an intermediate image and re-forming the intermediate image on an enlargement-side conjugate plane as an enlarged image, in which the optical element arranged closest to the magnification side is lens, and includes: a first adjustment group which moves along the optical axis when adjusting an imaging position of a region including the farthest point from the optical axis in the magnified image; and a second adjustment group which moves along the optical axis when adjusting the imaging position of the region including the nearest point from the optical axis in the magnified image. The second adjustment group has a positive refractive power as a whole, and is arranged closest to the reduction side.SELECTED DRAWING: Figure 1

To provide an imaging optical system capable of effectively correcting chromatic aberration, and an imaging apparatus equipped with such an imaging optical system. [Solution] The imaging optical system 100 comprises, in order from the object side to the image side, a front group 110, an aperture 130, and a rear group 120. The front group 110 comprises, in order from the object side to the image side, a first group 111 having negative power and a second group 112 having positive power. The second group 112 comprises a third lens 30 and a fourth lens 40 adjacent to the third lens 30 on the image side and positioned closest to the image. If the Abbe number of the third lens 30 is ν21, the Abbe number of the fourth lens 40 is ν22, the focal length of the third lens 30 is f3, and the focal length of the fourth lens 40 is f4, then the following conditional expression ν21<30.000 44.000<ν22 0.000 < |f3 / f4| < 0.500 It satisfies the condition.

The application discloses an optical system for fundus imaging and a fundus camera thereof. The optical system for fundus imaging comprises an illumination assembly, an imaging assembly, an objective lens assembly and a diaphragm structure. The illumination assembly comprises a light source, and an illumination light path is formed between the light source and an examination position to provide an illumination beam to irradiate a pupil. The imaging assembly comprises an imaging element to form a fundus image, and an imaging light path is formed between the imaging element and the examination position. The objective lens assembly is arranged in the illumination light path and the imaging light path, and an objective lens optical axis is formed between the objective lens assembly and the examination position. The illumination light path and the imaging light path are arranged at an angle and are separately arranged on two sides of the objective lens optical axis. The diaphragm structure comprises a first light-transmitting part arranged in front of the imaging element to allow a fundus-reflected light beam to pass through. In the case of allowing the fundus-reflected light beam to pass through the imaging light path, optical ghost images caused by stray light reflected by the objective lens assembly are eliminated.

The image forming optical system is capable of forming an image on a conjugated plane on a reduction side as an intermediate image and re-forming the intermediate image as a magnified image on a conjugated plane on a magnification side. The image forming optical system includes: a first adjustment group that moves along an optical axis in adjusting an image formation position of a region of the magnified image including a farthest point from the optical axis; and a second adjustment group that moves along the optical axis in adjusting an image formation position of a region of the magnified image including a nearest point from the optical axis. An optical element disposed closest to the magnification side is a lens. The second adjustment group has a positive refractive power as a whole, and is disposed closest to the reduction side.

Provided are a camera module, a vehicle-mounted system, and a moving body that, even when a lens has a small diameter, make it possible to secure sufficient bonding area between the lens and a vibrating body that surrounds an imaging optical system so as not to interfere therewith.　In a camera module 300 according to the present invention, a vibrating body 62 of a vibration mechanism is disposed surrounding a lens barrel 22 from the outside so as not to be in contact with the lens barrel 22, and has, at an object-side end portion 62d thereof that is joined to a first lens 31, an extending portion 62e that extends radially inward such that the entirety thereof is in contact with an image-side surface 31a of the first lens 31. The lens barrel 22 holds, at the most object-side end thereof, a second lens 32 that is adjacent to the first lens 31 on the image side of the first lens 31. At least one among the first lens 31, the second lens 32, and the lens barrel 22 has a geometrically-shaped portion 22a for separating the extending portion 62e and the lens barrel 22 or the second lens 32 from each other in the radial direction and / or the optical axis direction so as not to interfere with each other.

The present application relates to a kind of airborne photoelectric load dual optical path co-detector infrared optical system, belong to airborne photoelectric load imaging field, the infrared optical system of the airborne photoelectric load includes long focus focusing sub-system and continuous zoom sub-system, two sub-systems have common image plane, by moving switching mirror to make it cut into optical path and cut out optical path to carry out long focus focusing and continuous zoom two imaging state switching, switching mirror cut into optical path when participating in optical imaging, optical system is in long focus focusing state, the switching mirror cut out optical path when not participating in optical imaging, optical system is in continuous zoom state, optical path design is compact, ingenious, and imaging performance is excellent, can realize long focus and large zoom ratio design, and two optical systems share a mid-wave refrigeration detector, can greatly reduce the system cost of airborne photoelectric load.

An imaging optical system comprising, from an object side to an image side along an optical axis: a first lens group; a prism comprising a light input surface at which the light that has passed through the first lens group is incident; a plurality of reflective surfaces that reflect the incident light; a light output surface from which the light reflected from the last reflective surface of the plurality of reflective surfaces is emitted, the plurality of reflective surfaces are arranged so that the chief ray incident from the light input surface is reflected multiple times within the prism so as to self-intersect a chief ray path at least once within the prism; a second lens group comprising at least one optical element having negative refractive power; an image sensor on which the light that has passed through the second lens group focuses images.

This invention provides a spectral camera capable of capturing spectral images with suppressed ghosting effects. [Solution] The spectroscopic camera 1 comprises a plurality of planar elements including an etalon, a first lens group positioned on the object side of the etalon, a second lens group positioned on the image side of the etalon, and an image sensor that receives light that has passed from the etalon through the second lens group. Parallel light collimated by the first lens group is incident on the plurality of planar elements, and the second lens group constitutes an imaging optical system that forms an image on the image sensor of the light that has passed through the plurality of planar elements. In the plurality of planar elements into which the parallel light is incident, there are two or fewer Fresnel reflection interfaces where an anti-reflective coating is not provided.

A good low-pass filter (LPF) effect is obtained by driving the LPF with a movable element. [Solution] The control device 10 includes control means 10a that controls a plurality of drive units 17, 34 that move a movable element, which is either an optical element included in the imaging optical system or an image sensor that receives a light beam from the imaging optical system, in a direction different from the optical axis direction of the imaging optical system, and selection means 10b that selects a periodic drive unit from the plurality of drive units that periodically moves the movable element using information on the driving characteristics of each of the plurality of drive units.

The application discloses a multi-channel molecular interaction detection device and method based on imaging and photoelectric array detection, and relates to the technical field of molecular interaction detection. The device comprises a multi-channel optical fiber array, an imaging optical system, a photoelectric detection unit and a signal processing module. The imaging optical system can perform spatial separation imaging on multiple light signals, or perform time sequence separation imaging through a high-speed shutter and channel polling. The photoelectric detection unit adopts a CMOS / CCD area sensor, a photodiode array or a photomultiplier tube array, so that a single detection module replaces traditional multiple spectrometers. The signal processing module realizes non-crosstalk signal extraction and analysis of each channel through ROI partition, time sequence division or channel addressing. The application can be compatible with multiple signals such as biological layer interference spectrum, laser reflection spectrum and up-conversion nanometer material probe emission spectrum, has the advantages of low cost, small size, high channel consistency and strong expansibility, can effectively suppress channel crosstalk, and is suitable for high-throughput detection scenes.

The present invention realizes a projector that can prevent the degradation of optical performance caused by changes in the shape of the reflective surface due to localized high temperatures of the projector's reflector. It includes an image display unit and an imaging optical system that magnifies and projects the image displayed by the image forming section of the image display unit onto a projection surface. The imaging optical system includes: a lens system (LS) to which image light from the image forming section is incident; a synthetic resin reflector (M) disposed on the magnifying side of its aperture stop (S) and having refractive power; and an image correction control unit (4) that corrects for degradation of the magnified image caused by uneven temperature rise of the reflector (M) due to the intensity distribution of the imaging beam.

An imaging optical system consists of: a first lens group having positive power; a second lens group having negative power; a third lens group having positive power; a fourth lens group having positive power; a fifth lens group having negative power; a sixth lens group having positive power; and a seventh lens group having negative power. The first through seventh lens groups are arranged in this order such that the first lens group is located closest to an object and that the seventh lens group is located closest to an image plane. An interval between each pair of lens groups located adjacent to each other which belong to the first through seventh lens groups changes while the imaging optical system is zooming from a wide-angle end toward a telephoto end. The second lens group and the sixth lens group are fixed with respect to the image plane.

This application relates to an under-display fingerprint recognition system and electronic device based on a superlens, belonging to the field of under-display fingerprint technology. The under-display fingerprint recognition system sequentially includes a screen, an imaging lens group, a filter, and a sensor. The imaging lens group includes at least one superlens, and the remaining lenses are one or more of superlenses, spherical lenses, aspherical lenses, and folding superlenses. The superlens consists of a substrate and a micro / nano structure layer disposed on the substrate. This application utilizes the excellent electromagnetic wave manipulation capability of the superlens to replace some traditional spherical or aspherical lenses in the imaging optical system, reducing the system volume and weight to a certain extent. Furthermore, combining the advantages of the superlens as a planar optical element, the system structure is innovated, reducing the total vertical length of the device under the screen and effectively thinning the device.

A method is disclosed for use in an exposure apparatus comprising: at least one substrate support configured to support a substrate; a patterning device support configured to support a patterning device; and imaging optics arranged to form an image of a patterning device supported by the patterning device support on a substrate supported by the at least one substrate support when disposed in an exposure region. The method comprises making one or more measurements that are indicative of a shape of a patterning device supported by the patterning device support. There is at least some temporal overlap between making the one or more measurements and moving a substrate support of the at least one substrate support away from the exposure region and / or moving a substrate support of the at least one substrate support towards the exposure region.

This invention discloses an imaging optical system for a polarized television camera, comprising a four-channel imaging system, a four-channel polarizer, and four image sensors. The four-channel imaging system is arranged in a parallel 2×2 array, labeled as Channel I, Channel II, Channel III, and Channel IV. Each of the four-channel imaging systems includes a first lens, a second lens, a cemented lens, a fifth lens, a sixth lens, a seventh lens, and a folding prism. The front surface of the four-channel polarizer is etched with crosshairs, dividing the polarizer into four quadrants. The photosensitive surfaces of the four image sensors are all located at the focal plane of the imaging system. This invention utilizes a four-channel polarizer and a folding prism to construct a polarized television imaging system that can simultaneously acquire four images of the same scene with different polarization states, significantly reducing the deviation between the polarization angles of the four channels.

A hyperspectral inspection system is disclosed. The hyperspectral inspection system may include a broadband light source configured to emit broadband light. The hyperspectral inspection system may include a set of illumination optics configured to direct broadband light to a sample. The hyperspectral inspection system may include a hyperspectral camera assembly, and a set of imaging optics configured to collect light from the sample and direct light to the hyperspectral camera assembly to acquire multiple images of the sample at different wavelength bands. The hyperspectral camera assembly may include a set of sensors and a set of filter plates positioned in front of the set of sensors, wherein a respective filter plate is positioned in front of a respective sensor.

The present application discloses an augmented reality optical device with virtual image depth adjustment function, comprising: a display unit for displaying a virtual image; an imaging optical system for refracting or reflecting virtual image light emitted by the virtual image displayed on the display unit; a reflection unit composed of a plurality of reflection modules for reflecting and transmitting the virtual image light refracted or reflected by the imaging optical system towards the pupil of the user's eye, thereby providing the user with the virtual image; an optical mechanism configured with the reflection unit composed of a plurality of reflection modules for transmitting real object image light emitted by a real object towards the pupil of the user's eye; a position adjustment device for moving at least one of the display unit and the imaging optical system in a direction parallel to the optical axis of the imaging optical system; a focal length tracking unit for measuring the focal length of the user; and a control unit for controlling the movement of the position adjustment device based on the focal length of the user measured by the focal length tracking unit; the control unit controls the movement of the position adjustment device so that the depth of the virtual image displayed on the display unit corresponds to the focal length of the user measured by the focal length tracking unit.

To provide an image capturing optical system capable of correcting well for aberrations, an image capturing device, and a camera system.SOLUTION: An image capturing optical system is provided, comprising a first lens group having positive refractive power, a second lens group, and a third lens group. The first lens group comprises a sub lens group G1A, an aperture stop, and a sub lens group G1B. The sub lens group G1A comprises a lens element L1A1 and a lens element L1A2. The lens element L1A1 has an object-side surface that is convex toward the object side. The third lens group comprises a lens element L3E having negative power and a lens element L3P located next to the lens element L3E on the object side.SELECTED DRAWING: Figure 1

The invention provides a projector capable of preventing deterioration of optical performance caused by a change in the shape of a reflecting surface due to local high temperature of a reflector of the projector. An imaging optical system having an image display element and an image displayed by an image forming unit of the image display element, the imaging optical system having: a lens system (LS) on which image light from the image forming unit is incident; and a synthetic resin mirror (M) that is disposed on the enlargement side of the aperture stop (S) and has refractive power, and the projector has: a thermistor (21) that detects the temperature of a predetermined position on the reflection surface of the mirror on the back side of the reflection surface; a cooling unit that includes a Peltier element (22) and heat transfer members (11-13) and cools an area region including a predetermined position; and a control means (30) for constantly controlling the cooling of the area region by the cooling means on the basis of the temperature detection by the thermistor.

The application discloses an infrared focal plane array modulation transfer function testing device and method, which comprises an infrared light source, a knife-edge target, a manual rotating table, an imaging optical system, an infrared focal plane array detector, a three-dimensional displacement mechanism, a driving and data acquisition system and a control computer; the infrared light source comprises two light sources of a surface source black body and an integrating sphere, the surface source black body is used for testing a focal plane detector in a mid-infrared and far-infrared response band, and the integrating sphere light source is used for testing a short-wave infrared focal plane detector; the knife-edge target is installed on the manual rotating table, the imaging optical system is located between the knife-edge and the infrared focal plane array detector, the infrared focal plane array detector is arranged on the three-dimensional displacement mechanism, the driving and data acquisition system is connected with the infrared focal plane array detector and the control computer respectively, and the control computer is also connected with the three-dimensional displacement mechanism and the infrared light source respectively. The application has the advantages of wide application, convenient testing, comprehensive testing parameters, high testing accuracy and the like.