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

An image pickup apparatus includes an image sensor having a plurality of pixels configured to receive light beams passing through a plurality of different pupil partial areas in an imaging optical system including a first optical system and a second optical system arranged in parallel with the first optical system, and a processor configured to acquire, based on a pair of signals from the plurality of pixels, a first defocus amount in a first focus detecting area at a first image height based on a first optical axis of the first optical system and a second defocus amount in a second focus detecting area at a second image height based on a second optical axis of the second optical system, and control the imaging optical system based on an average defocus amount of the first defocus amount and the second defocus amount.

The invention discloses a monocular four-dimensional imaging device and method based on a metasurface. The monocular four-dimensional imaging device comprises an image sensor and an imaging optical system arranged in front of the image sensor. Wherein the imaging optical system comprises a metasurface, the metasurface is designed to simultaneously generate a self-acceleration Airy point spread function with depth-dependent lateral displacement for incident left-hand circularly polarized light and right-hand circularly polarized light, and the self-acceleration Airy point spread function can generate a self-acceleration Airy point spread function with depth-dependent lateral displacement under the condition that a mechanical moving part is not used. Carrying out polarization separation and focusing on the left-hand circularly polarized light and the right-hand circularly polarized light; the image sensor is used for recording a mixed image containing the left-hand circularly polarized light information and the right-hand circularly polarized light information at the same time through single exposure so as to obtain three-dimensional depth and polarization information of the metasurface, namely monocular four-dimensional imaging of the metasurface. The scene perception and understanding capability of a machine is greatly enhanced, and the method has unique advantages in the aspects of target identification, material discrimination, severe environment perception and the like.

An imaging optic (10) for projection lithography serves to image an object field (5), in which a reticulum to be imaged can be arranged, onto an image field (11), in which a substrate to be exposed can be arranged. The imaging optic (10) has a plurality of mirrors (M1 to M8) for guiding imaging light (16) along an imaging beam path from the object field (5) to the image field (11). The image-side numerical aperture of the imaging optic (10) is greater than 0.75. The optical conductivity of the imaging optic (10) is greater than 45 mm. 2 The result is an imaging optic whose usability for a projection exposure system is improved.

The invention relates to the field of industrial visual inspection, and discloses an ultraviolet visible light confocal object image double telecentric imaging optical system which comprises a first lens, a second lens, a first gluing piece, a diaphragm, a second gluing piece, a third lens and a fourth lens which are sequentially arranged from an object plane to an image plane, and an optical axis serves as a rotation center. Wherein the object surface of the first lens is a convex spherical surface, the curvature radius of the first lens is 110.02 mm, the image surface of the first lens is a concave spherical surface, and the curvature radius of the first lens is 65.59 mm; the object surface of the second lens is a concave spherical surface, the curvature radius of the second lens is-200.11 mm, the image surface of the second lens is a convex spherical surface, and the curvature radius of the second lens is-130.80 mm. The system can be suitable for measuring an object with the object distance of 110 mm and an industrial camera with the imaging image surface diameter of 11 mm or below, the aperture of the system is F / 8, the system is also suitable for ultraviolet and visible light environments, it is ensured that lossless and high-contrast imaging can still be achieved in different light source environments, and therefore high-precision and high-reliability surface defect recognition and classification tasks are supported.

Provided is a substrate inspection apparatus which includes a stage to accommodate a substrate, an image sensor disposed on the stage, an objective lens disposed between the image sensor and the stage to project an image of the substrate, an imaging optical system disposed between the objective lens and the image sensor, a first main beam splitter disposed between the imaging optical system and the objective lens, a first illumination light source disposed at one side of the first main beam splitter to provide first illumination light to a first depth of the substrate, and a second illumination light source disposed adjacent to the first illumination light source to provide second illumination light source, which has a wavelength shorter than that of the first illumination light source, to a second depth, which is shallower than the first depth, through the first main beam splitter.

The invention discloses an infrared four-waveband composite annular aperture folded imaging optical system, belongs to the technical field of optical catadioptric optical paths, and aims to solve the problem that 1550nm / 1064nm dual-laser and medium-wave / long-wave infrared four-waveband composite detection is difficult to realize at the same time in the conventional annular aperture imaging technology. The system comprises a primary mirror, a secondary mirror, a 1064nm laser spot correction mirror, a 1550nm laser spot correction mirror, a 1064nm laser spectroscope, a 1550nm laser spectroscope, a broadband infrared detector, a 1550nm laser detector and a 1064nm laser detector. And high-performance common-aperture composite detection of 1064nm / 1550nm dual laser and medium-wave / long-wave infrared four wavebands is realized through a multi-stage light splitting mechanism. The limitation that a traditional annular aperture system is single in wave band is broken through, and the all-weather sensing and target recognition capability of the system in a complex environment is remarkably improved.

The utility model discloses an object space telecentric imaging optical system and a position alignment device, the object space telecentric imaging optical system comprises an imaging system and an illumination system, the imaging system is provided with an object side and an image side which are oppositely arranged along an optical axis direction; the object space telecentric imaging optical system is composed of a first lens, a second lens, a third lens, a beam splitter prism, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the object side to the image side. The illumination system comprises a light source, the light source is arranged corresponding to the beam splitter prism and is used for emitting an illumination light beam, the illumination light beam is reflected by the beam splitter prism and then illuminates the imaging system, through mutual combination of different lenses and reasonable distribution of positive and negative focal power, the magnification factor is increased, distortion is reduced, and high illumination uniformity and low cost are provided.

The invention belongs to the technical field of optical system aberration analysis, and discloses an experimental device for measuring and correcting image distortion of an optical imaging system, which comprises an optical axis testing device and an optical distortion testing platform, and the optical distortion test platform is used for testing optical distortion of the optical imaging system to be tested and integrating optical distortion data with optical axis deviation to obtain an image distortion fitting coefficient and a distortion correction model of the optical imaging system. According to the invention, the image distortion of the optical imaging device can be measured, the image distortion can be corrected, the imaging device can correct the deviation between the optical axis and the center of the target surface when the system is installed and adjusted, the optical distortion of the whole optical system can be corrected, and the method has guiding significance for the application of detecting and identifying the accurate position of a target by using the optical system.

Disclosed are a laser annealing system and a method of fabricating a semiconductor device using the same. The laser annealing system having multiple laser devices may include a stage, on which a substrate is loaded, a light source generating a plurality of laser beams to be provided to the substrate, an optical delivery system disposed between the light source and the stage and used to deliver the laser beams, a homogenizing system disposed between the optical delivery system and the stage, the homogenizing system including an array lens including a plurality of lens cells which allow the laser beams to pass therethrough and homogenize the laser beams, and an imaging optical system disposed between the homogenizing system and the stage to image the laser beams on the substrate.

An imaging optical system includes, in order from an object side to an image side, a first lens group, a second lens group, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power, in which, when focusing from an infinite distance object to a close distance object, the first lens group remains stationary with respect to an image surface, the second lens group moves to the object side along an optical axis, the third lens group remains stationary with respect to the image surface, the fourth lens group moves to the object side along the optical axis, and the fifth lens group remains stationary with respect to the image surface, the imaging optical system includes an aperture diaphragm, and the imaging optical system satisfies a predetermined conditional expression.

To provide an image-forming optical system that achieves both of a high image-forming performance and miniaturization / reduced weight while having a large aperture ratio, has a light focus lens group, and suppresses bleeding at the time of focusing.SOLUTION: An image-forming optical system consists of a first lens group, a second lens group, a third lens group with positive refractive power, a fourth lens group with positive refractive power, and a fifth lens group with negative refractive power, in order from the object side to the image side, the first lens group is immobile relative to an image surface at the time of focusing from an object at infinity to a near-distance object, the second lens group travels to an object side along a light axis, the third lens group is immobile relative to an image surface, the fourth lens group travels to an object side along the light axis, the fifth lens group is immobile relative to an image surface, an aperture diaphragm is provided between a lens surface in the furthest image side of the second lens group and a lens surface in the furthest object side of the fourth lens group, and a predetermined conditional expression is satisfied.SELECTED DRAWING: Figure 1

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.

The invention provides an imaging optical system suitable for a large aperture ratio telephoto lens which is light in weight and in which chromatic aberration on the axis is well corrected. This imaging optical system is configured from a first lens group (G1), a second lens group (G2), and a third lens group (G3), which are arranged in this order from the object side and have positive refractive power, only the second lens group (G2) moves when focusing from an object at infinity to an object at a close distance, the first lens group (G1) is configured from a group 1a and a group 1b arranged in this order from the object side, and the third lens group (G3) is configured from a group 1b and a group 1b arranged in this order from the object side. The 1b group has a meniscus-shaped negative lens (L1na) having a convex surface facing the object side and a negative lens (L1nb) different from the negative lens (L1na), the negative lens (L1na) being a negative lens located closest to the object side in the first lens group (G1), and the imaging optical system satisfies a predetermined conditional expression.

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 Raman spectroscopy apparatus comprises an imaging optical system that transmits light from an object to a spectrograph along an optical path. A scanning device intersects, and is movable with respect to, the optical path. Light is directed onto the scanning device to illuminate the object at a plurality of illumination points. The imaging optical system transmits Raman scattered light emitted from the object at the illumination points to an intermediate image plane, the scanning device being located at the intermediate image plane, and transmits the Raman scattered light from the intermediate image plane to the spectrograph. In comparison with conventional confocal Raman spectroscopy, the apparatus can perform Raman analysis of a sample more quickly, and in comparison with conventional line scan Raman spectroscopy the apparatus can perform Raman analysis more accurately.

This invention provides a telephoto imaging optical system and its application in a camera module, comprising six lenses. The first lens has positive optical power and a convex object-side surface; the second lens has negative optical power and a concave image-side surface; the third lens has positive optical power, a convex object-side surface, and a concave image-side surface; the fourth lens has positive optical power; the fifth lens has optical power, a convex object-side surface, and a concave image-side surface; and the sixth lens has optical power and a concave image-side surface. By rationally configuring the refractive power and surface shape of each lens, the optical lens can achieve the characteristics of telephoto, small overall size, and large aperture. Simultaneously, it can capture object details well, improving the optical lens's ability to capture details of the photographed object, enhancing image quality, and increasing resolution and image clarity to meet people's high-definition imaging requirements for telephoto optical lenses.

An ophthalmic device and an ophthalmic device control program are provided that are capable of appropriately acquiring three-dimensional information about the anterior segment of the eye while stabilizing the fixation of the subject's eye. [Solution] The fixation target presenting optical system presents a fixation target to the subject's eye. The cross-sectional imaging optical system captures cross-sectional images of the anterior segment by receiving return light from the anterior segment that has been optically sectioned by the imaging light. The moving unit moves an optical unit including the fixation target presenting optical system and the cross-sectional imaging optical system relative to the subject's eye. The control unit can perform a three-dimensional information acquisition process to acquire three-dimensional information about the anterior segment by capturing cross-sectional images of multiple locations on the anterior segment while moving the optical unit and scanning the imaging light. When performing the three-dimensional information acquisition process, the control unit positions the fixation target within a limited area centered on the focal position of the entire lens system of the fixation target presenting optical system, regardless of the refractive power of the subject's eye.

An imaging optical system lens, an image capturing device and an electronic device are disclosed. The imaging optical system lens includes seven lenses, which are sequentially arranged from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. Each of the first lens to the seventh lens includes an object side surface facing the object side direction and an image side surface facing the image side direction. The first lens has a negative refractive power, the object side surface of the first lens is concave at a vicinity of an optical axis, and the image side surface of the first lens is convex at the vicinity of the optical axis. The object side surface of the second lens is convex at the vicinity of the optical axis. When certain conditions are met, the miniaturization of the imaging optical system lens is facilitated, and good imaging quality is provided.

An electronic device is provided. The electronic device includes a first imaging optical system including a first image sensor, and a second imaging optical system including a second image sensor, a reflective member, a first lens group, a second lens group, and a third lens group, the first, second, and third lens groups being sequentially arranged from the reflective member to the second image sensor, the second and third lens groups being configured to slide with respect to the first lens group, and the first and second imaging optical systems being configured to satisfy a conditional expression SSW / SST>2, where SSW denotes a size of the first image sensor and SST denotes a size of the second image sensor.

The invention relates to a method and device for rapidly collecting and identifying pet iris biological characteristics, and the device comprises an optical imaging module which comprises a variable-focus optical assembly, and the variable-focus optical assembly is coupled with an image sensor; the 3D positioner comprises a laser transmitter and a proximity sensor and is used for determining the three-dimensional position of the target eyeball; and the wireless communication unit is used for data transmission. The invention has the beneficial effects that a compact, portable and intelligent optical device is provided, and the iris of an animal can be positioned and focused in real time even under the condition that a target moves or is not matched with the target. According to the invention, a multi-mode sensing technology is integrated to determine the three-dimensional position of a target eyeball, an imaging optical system is automatically focused, and a clear high-resolution image is captured under near-infrared illumination.

The application provides an optical system for fundus imaging of an eye to be tested, comprising: a fundus illumination light path for providing a light source to illuminate the fundus of the eye to be tested; a fundus imaging light path comprising an accommodating lens for fundus imaging of the eye to be tested; a fixation light path for providing a fixation target to enable the eye to be tested to fixate; and an auxiliary accommodating light path, the auxiliary accommodating light path sharing the accommodating lens with the fundus imaging light path to improve the accuracy and reliability of the accommodation. By sharing the accommodating lens between the auxiliary accommodating light path and the fundus imaging light path, the complicated linkage adjusting mechanism is avoided, the accuracy and reliability of the accommodation alignment are improved, the device cost is saved, and the purposes of economy, high efficiency, accuracy and convenience are achieved. Further, the fundus imaging of the eye to be tested is realized by combining the iris split imaging and the fundus illumination technology, and whether the accommodation imaging light path of the fundus imaging optical system is adjusted to the clearest according to the refractive power of different eyes to be tested is objectively evaluated, so that the clearest fundus color photograph is obtained.

The invention relates to a testing device for optically checking objects for authenticity, in particular for checking whether objects have a predetermined, machine-readable code-encompassing security marking with known fluorescence properties. The test device includes a lighting unit designed and arranged to illuminate an object to be tested with electromagnetic radiation - preferably light visible to the human eye - in a first, fluorescence-stimulating wavelength range. The test device comprises an area sensor with a plurality of light-sensitive sensor elements and an imaging optic which is designed and arranged to project an image of an object onto the area sensor, wherein the area sensor is designed to output an image signal representing an image projected onto the area sensor. The imaging optics comprise an optical filter in the form of a high-pass or low-pass filter, in particular an edge filter, which is configured to block electromagnetic radiation in the first, fluorescence-exciting wavelength range, in particular to absorb it, and to transmit light in a second wavelength range, wherein the second wavelength range comprises wavelengths corresponding to expected fluorescence and wherein the second wavelength range does not overlap with the first wavelength range. The test device is designed to detect the insertion of an object, to check images of the object represented by image signals from the area sensor, and to reject an object if one or more test criteria are not met, or to accept it if the test criterion(s) are not met. The testing device is further designed to identify a security marking on an object and to test a found security marking with regard to its fluorescence properties.

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.

To provide a new technique to image or measure an eye to be examined at a wide angle while appropriately performing positioning between an apparatus optical system and the eye to be examined.SOLUTION: An ophthalmologic apparatus includes an objective optical system, an illumination optical system, an imaging optical system, an imaging unit, a moving mechanism, and a three-dimensional position specification unit. The objective optical system optically relays a measurement position where the pupil of the eye of a subject can be arranged. The illumination optical system irradiates the eye with illumination light through the objective optical system. The imaging optical system is configured to receive return light of the illumination light from the eye through the objective optical system. The imaging unit includes two or more cameras arranged so that a position substantially optically conjugate with the measurement position relayed by the objective optical system is included in a visual field. The moving mechanism moves the objective optical system, the illumination optical system, the imaging optical system, and the imaging unit relative to the eye. The three-dimensional position specification unit determines a three-dimensional position of the eye on the basis of two or more captured images of the eye obtained by the imaging unit.SELECTED DRAWING: Figure 1

The invention discloses a dual-band polarization imaging optical system, which comprises an optical window, a spectroscope, a visible light imaging module and a medium-wave infrared polarization imaging module, and is characterized in that the visible light imaging module comprises a lens group and a visible light sensor, and the medium-wave infrared polarization imaging module comprises a plurality of lens groups, a wire grating polarization optical splitter and two medium-wave infrared sensors; visible light and medium-wave infrared light enter the dual-waveband polarization imaging optical system from the optical window, the visible light is imaged on the visible light sensor after being reflected by a long-wave-pass two-way light splitting film on the surface of the spectroscope, and an image is formed after photoelectric conversion; medium-wave infrared light passes through the long-wave-pass two-way beam splitting film and the beam splitter and then is separated into two kinds of polarized light through the polarization beam splitting system for independent imaging. According to the invention, the problem that the optical axes of visible light and infrared light are difficult to keep consistent in the prior art is solved; and the second problem is that an infrared polarization imaging system is difficult to efficiently integrate with a visible light imaging system.

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.

A laser machining apparatus includes: a beam characteristic calculation unit that calculates a beam characteristic of laser light; an optical component temperature estimation unit that estimates an estimated temperature of an optical component based on the beam characteristic and temperature information; a thermal lens estimation unit that estimates a thermal lens amount of the optical component based on the estimated temperature; an imaging performance change estimation unit that estimates, based on the thermal lens amount, an estimated imaging performance change amount that is an amount of change in imaging performance of an imaging optical system of the machining head from before start of machining; a correction amount calculation unit that calculates a correction amount of a machining parameter based on the estimated imaging performance change amount; and a control unit that changes the machining parameter based on the correction amount during the laser machining.

The invention provides an image sensor and an image pickup apparatus. An image sensor includes: a pixel array in which a plurality of pixels are arranged; and a first memory configured to hold a signal output from the pixel array. Each of the plurality of pixels includes: a plurality of photoelectric conversion parts configured to photoelectrically convert light that has passed through different pupil regions of the imaging optical system and correspondingly output analog signals; an analog-to-digital conversion section configured to convert the analog signals output from the plurality of photoelectric conversion sections into digital signals; and a latch section configured to latch the digital signal converted by the analog-to-digital conversion section. The first memory holds the digital signal latched by the latch section.

An image formation optical system (OL) comprises a front group (GF) including a plurality of lenses and having positive refractive power, and a rear group (GR) including a plurality of lenses, the front group and the rear group being disposed in order from the object side to the image side. The front group includes a negative lens disposed closest to the object side and having a concave surface facing the object side. The distance on the optical axis between a lens disposed closest to the image side in the front group and a lens disposed closest to the object side in the rear group is the maximum among the distances on the optical axis between the lenses adjacent to each other. The image formation optical system satisfies a predetermined conditional expression.