160results about How to "Avoid stray light" patented technology

A spectroscopy system is provided which is optimized for operation in the VUV region and capable of performing well in the DUV-NIR region. Additionally, the system incorporates an optical module which presents selectable sources and detectors optimized for use in the VUV and DUV-NIR. As well, the optical module provides common delivery and collection optics to enable measurements in both spectral regions to be collected using similar spot properties. The module also provides a means of quickly referencing measured data so as to ensure that highly repeatable results are achieved. The module further provides a controlled environment between the VUV source, sample chamber and VUV detector which acts to limit in a repeatable manner the absorption of VUV photons. The use of broad band data sets which encompass VUV wavelengths, in addition to the DUV-NIR wavelengths enables a greater variety of materials to be meaningfully characterized. Array based detection instrumentation may be exploited to permit the simultaneous collection of larger wavelength regions.

The present invention is directed towards radiation detectors and methods of detecting incident radiation. In particular the present invention is directed towards photodiodes with controlled current leakage detector structures and a method of manufacturing photodiodes with controlled current leakage detector structures. The photodiodes of the present invention are advantageous in that they have special structures to substantially reduce detection of stray light. Additionally, the present invention gives special emphasis to the design, fabrication, and use of photodiodes with controlled leakage current.

When light generated in a light emitting layer of a display device is emitted through insulating films such as a planarizing film, an interlayer insulating film and a gate insulating film of a transistor, diffused reflection is caused due to slight-rough surfaces of the insulating films every time light passes through each insulating film. Accordingly, problems are caused in which stray light is caused, an outline of a pixel becomes indistinct, and a characteristic of the transistor is deteriorated. A display device according to the invention includes a transistor formed over a substrate, an insulating film with a light shielding property formed on the transistor, an opening for transmitting light therethrough formed in the insulating film with the light shielding property, and a light emitting element formed overlapping the opening.

The liquid crystal display of the present invention comprises a backlight, an anisotropic scattering film having different scattering properties depending on incident angles, a liquid crystal cell comprising liquid crystals sandwiched between two facing substrates, polarizing plates respectively disposed on the backlight side and visual recognition side of the liquid crystal cell, and at least one optical diffusion film on the visual recognition side of the liquid crystal cell. A difference H(θ)−H(0) between the haze H(θ) of the anisotropic scattering film for incident light at a gray scale inversion angle θ of the liquid crystal cell, and the haze H(0) for incident light from the normal direction of this anisotropic scattering film is 5% to 100%, and the anisotropic scattering film is disposed between the backlight and the liquid crystal cell.

An optical lens includes a lens section that transmits light therethrough; and a light shielding section provided close to the lens section, the light shielding section having a light shielding film formed on a surface of a lens base material. The surface layer of at least a part of the light shielding film including an inner edge thereof on a lens section side, and a boundary portion of the lens section in contact with the light shielding layer is subjected to a roughening process.

A micro lens array includes a plurality of convex micro lenses formed on a transparent substrate in an array. The micro lenses are convex toward a surface of the substrate in a position inward of the surface of the substrate and the top of the convex surface of the micro lenses is lower than the surface of the substrate.

The invention provides an image pickup module and manufacturing and assembling methods of the same, endoscope and capsule type endoscope using the same. An image pickup module comprises a lens assembly including a lens having a flange part, and a frame component for shading a circumferential surface excluding a neighborhood of a top portion of the flange part in the lens; an image pickup element which the top portion of the flange part touches; and an illumination element arranged around said lens assembly and said image pickup element. It is constituted so that exit light from a luminescence surface of said illumination element may not reach directly to an exposed portion which is not shaded by said frame component of the flange part.

It is an object of the present invention to mount a focusing mechanism of a camera device on a vehicle without bringing the mechanism in contact with a worker's hands in an in-focus state of a lens system in the camera device having an eyelid part for preventing stray light covering part of a lens, and to improve the beauty and increase mounting flexibility. In a camera cover according to the present invention, a cylinder body (21) of the camera cover (10) covers most including the first half portion of the volume of the camera device, and the cylinder body (21), a frame body (23), an eyelid part (25) and / or an eyelid part (26), and a housing part (27) are integrally molded. Beauty seen from the front can be improved, and the beauty will not be spoiled when the camera device (12) is displaced together with the camera cover (10) and mounted.

A sheathed endoscope, includes: an endoscope and a disposable component. The disposable compartment protects the inner and outer surfaces of the endoscope. The disposable compartment includes: a cap of endoscope tip in the distal end of endoscope, a disposable tube for biopsy forceps, and an outside sheath capsule for endoscope shaft. The tip cap connects the sheath capsule and the disposable tube for biopsy forceps. There are multiple windows set on the lateral side of endoscope tip, wherein pills containing transparent fluid are placed somewhere in between of the tip cap and the distal end of endoscope. The pills will be crushed by co-fraction of the tip cap and the distal end of endoscope, to release the transparent fluid to fill in the space formed between the tip cap and the distal end of the endoscope. This disposable sheath compartment in the invention will cover all surfaces of the endoscope with disposable material, preventing contaminations on endoscope during endoscopy, meanwhile there is anti-glaring design, to prevent producing of glaring in the space formed between the tip cap and the distal end of endoscope.

A projection display apparatus has: a TIR prism having a first prism surface, a second prism surface, and a third prism surface; a projection lens which is disposed opposite to the first prism surface; and an image display device which is disposed opposite to the second prism surface. The image display device reflects incident light in a first direction or in a second direction in accordance with an image signal. The first, second, and third prism surfaces are formed so as to define a modulated light path, wherein the light is reflected in the first direction, then is incident on the second prism surface, then is totally reflected internally on the third prism surface, then exits from the first prism surface, and then is incident on the projection lens along the modulated light path. The first prism surface includes a first effective light beam area and a first shield area for shielding the light, wherein the modulated light path passes through the first effective light beam area, and wherein the first shield area is formed on at least a part of the first prism surface except for the first effective light beam area.

An optical apparatus minimizes autofluorescence and stray light as well as leakage of excitation light and efficiently utilizes illuminating light from a fluorescence illumination optical system to allow observation of a bright fluorescence image. An observation apparatus has an objective, an observation optical system unit including a variable magnification optical system, and an imaging optical system unit including an imaging lens and an eyepiece. A fluorescence illumination apparatus, which is provided separately, is removably attached to the observation apparatus. The fluorescence illumination apparatus has a light source, a collector lens unit, and a reflecting member placed between the objective and the observation optical system unit at a position displaced from the optical axis of the objective to make light from the light source incident on the objective. An excitation filter is provided between the light source and the reflecting member. An optical member for selectively transmitting fluorescent light emitted from a sample is placed between the objective and the observation optical system unit.

The invention discloses an unmanned aerial vehicle autonomous landing guidance system based on solar-blind region ultraviolet imaging. The system comprises an ultraviolet source beacon module, a two-channel imaging module, a data processing module, a data sending module and a data storage module. The ultraviolet source beacon module is arranged on a landing platform; the two-channel imaging module, the data processing module, the data sending module and the data storage module are arranged on an unmanned aerial vehicle; the unmanned aerial vehicle carries out imaging on the ultraviolet source beacon module through the two-channel imaging module; then, the data processing module carries out processing on imaging data; and the data sending module sends a part of processing results of the data processing module to an unmanned aerial vehicle flight control system, and sends the rest processing results to the data storage module for storing. The solar-blind region ultraviolet imaging technology is, for the first time, applied to unmanned aerial vehicle autonomous landing guidance, and unmanned aerial vehicle autonomous landing guidance based on the solar-blind region ultraviolet imaging is realized.

An image carrier cartridge 25 comprises at least one image carrier 20 rotatably supported and exposure means 23 disposed at an exposure position for the image carrier 20 and the image carrier cartridge 25 is designed to be detachable relative to the body of an image forming apparatus. The exposure means 23 comprises an organic EL light emitting element array and an imaging optical system disposed in front of the organic EL light emitting element array, and a light shielding member 52, 53 for shielding ultraviolet rays is provided around the exposure means 23. According to this structure, in the image carrier cartridge to which organic EL array exposure heads as the exposure means are attached, the organic EL array exposure heads can be prevented from being deteriorated due to ultraviolet rays.

It is an object of the present invention to mount a focusing mechanism of a camera device on a vehicle without bringing the mechanism in contact with a worker's hands in an in-focus state of a lens system in the camera device having an eyelid part for preventing stray light covering part of a lens, and to improve the beauty and increase mounting flexibility. In a camera cover according to the present invention, a cylinder body (21) of the camera cover (10) covers most including the first half portion of the volume of the camera device, and the cylinder body (21), a frame body (23), an eyelid part (25) and / or an eyelid part (26), and a housing part (27) are integrally molded. Beauty seen from the front can be improved, and the beauty will not be spoiled when the camera device (12) is displaced together with the camera cover (10) and mounted.

Laser power monitoring arrangements interrupt power to a laser used in electro-optical readers upon detection of operating conditions not conforming to preestablished standards. An auxiliary light detector independently monitors the output power of a laser beam, and directly receives a portion of the laser beam reflected from a diffractive optical lens surface of an optical assembly for optically modifying the laser beam, or from a coated or uncoated inclined surface of a split collimating lens of the optical assembly. The split collimating lens may have its lens portions in mutual contact or separated by an air gap.

A camera module is composed from a lens unit including at least one lens, a barrel provided with the lens and having a barrel opening, and a lens holder for holding the barrel; and an image pickup device portion provided under the lens unit and having an image pickup device housing space in which an image pickup device is hermetically provided. The barrel opening of the barrel has an annular edge which serves as a diaphragm, and the annular edge of the barrel opening has a lower annular corner portion which is located on the side of the lens, wherein the lower annular corner portion of the annular edge is formed so as to have a rounded cross-sectional shape and staining is formed on the lower annular corner portion.

An optical module 10 has a laser light source 20, optical branching means 24 for receiving laser light from the laser light source 20, making a part of the laser light pass through the optical branching means and branching a remaining part of the laser light; a photodetecting portion 30P receiving the remaining part of the laser light branched from the optical branching means 24 and a package 11 holding therein the laser light source 20, the optical branching means 24 and the photodetecting portion 30P, the package 11 having stray light reducing means 200, 201 and 202 provided therein to reduce stray light generated inside the package.

A lens having a quadrangular outer shape in a direction perpendicular to its center, an imaging element having a quadrangular outer shape in the direction perpendicular to the center axis, an element cover glass covering an imaging surface of the imaging element, a light guide placed outside at least one side of the lens and extending along the center axis, and a cylinder holder disposed between the lens and the light guide are disposed in a tip portion of an endoscope.

An imaging lens system includes, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The second lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. The third lens element with positive refractive power has an image-side surface being convex in a paraxial region thereof. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. The sixth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof.

An additional knurled ring for an optical lens is composed of an annular portion and teeth distributed in a radial direction around the outside of the annular portion. The inner diameter and shape of the additional knurled ring match the outer diameter and shape of an adjusting ring of the optical lens. The additional knurled ring is movably connected with the outside of the adjusting ring of the optical lens. Since the additional knurled ring for the optical lens can be extended towards the front of the lens and beyond the front end of the optical lens, the interference of stray light with the imaging of the optical lens is blocked. Digital scale designations are engraved or printed on the outside of the additional knurled ring for optical lens, the position of the scale and the values of the designations are corresponding to the focal length, aperture, and focal range information of the optical lens. The front end with the enlarged outside diameter of the additional knurled ring for optical lens is movably connected with a cap, and the shape and size of the cap matches the shape and size of the front end of the additional knurled ring.

The invention aims to provide an optical system of virtual reality equipment. According to the optical system, through arranging a transparent display screen between a reflector and human eyes, and respectively arranging a polarizer device and 1 / 8 or 1 / 4 wave plate at two sides of the display screen, and making the display screen transparent, a virtual content can be converted to a virtual image after reflection and be observed by the human eyes. Linear polarized light which is transmitted from the front surface of the display screen can be absorbed by an absorbing type polarizer device and does not enter the human eyes, thereby effectively isolating stray light. After the linear polarized light which is transmitted from the display screen penetrates through the 1 / 8 or 1 / 4 wave plate, be reflected by the reflector, penetrates through the 1 / 8 or 1 / 4 wave plate, penetrates through the display screen and penetrates through the absorbing type polarizer device, the linear polarized light enters the human eyes, thereby enlarging visual field angles which comprise a vertical-direction visual field angle and a horizontal-direction visual field angle. Furthermore the optical system has low chromatic aberration and higher energy utilization rate.

A hologram laser unit to be used for performing recording and reproducing operations of information for an optical disk, includes a light source, a photodetector, and a hologram element which are formed integrally with each other. The hologram element includes: a first hologram for detecting information signals from the optical disk, the first hologram being provided in an area having an effective diameter corresponding to a numerical aperture suitable for the optical disk; and a second hologram for compensating for only a transmitted light amount of light traveling toward the optical disk from the light source, the second hologram being provided contiguously outside the first hologram.

The invention provides a light scattering-based monodisperse aerosol particle size and concentration measuring device, and belongs to the technical field of measuring. According to the light scattering-based monodisperse aerosol particle size and concentration measuring device, light beam emitted by a laser passes through an optical attenuator, a beam expander, a first diaphragm, and a scattering cavity, and enters into a light trap; the upper wall and the lower wall of the scattering cavity are provided with a gas inlet pipe and a gas outlet pipe; a photosensitive area is formed via cross of the connection line of the gas inlet pipe and the gas outlet pipe with the light beam; a spherical mirror is arranged in the scattering cavity; and the focus of the spherical mirror and the center of the photosensitive area are superposed. The light scattering-based monodisperse aerosol particle size and concentration measuring device is capable of solving a technical problem that simultaneous rapid detection on particle size and concentration of high concentration monodisperse aerosol generated by standard aerosol generators can not be realize using conventional instrument. Beneficial effects are that, light scattering principles are adopted, particle counting method of pulse detection and spectrophotometric method of direct-current level detection are combined, rapid detection of the particle size and concentration of monodisperse aerosol can be realized without using filter membranes and destroying aerosol particles . The light scattering-based monodisperse aerosol particle size and concentration measuring device is used for providing means for calibration and source tracing of aerosol particle size and concentration detection-related instrument.

A fly cutter (10) having a rotating shaft (11) and a blade (12) projecting in the direction crossing the axis of the rotating shaft (11) is rotated about the axis of the rotating shaft (11). The fly cutter (10) being rotated and a base material (20) for forming an optical element are moved relative to each other in a cutting direction and a feeding direction to form worked surfaces (21) for forming an element surface. Out of two worked surfaces (21) adjacent, along a boundary (22) between worked surfaces (21), in the direction orthogonal to the rotating shaft (11), a lower side worked surface (21) is cut. The method can form a step at the boundary (22) between the two adjacent worked surfaces (21) when an optical element or a die is produced by cutting.

The invention discloses a video signal acquisition and recording device, comprising: a collecting and editing device and a memory, wherein the collecting and editing device adopts a digital signal processor, a programmable logic device and a secondary module optimization technology of a compression arithmetic coding structure; and the memory is a high-speed, large-capacity solid-state recorder forreal-time image and video signal data storage. The present invention also provides a long-distance high-definition laser camera, which adopts the optical selective filtering technology and the electronic photoelectric saturation suppression technology, tackles a variety of stray light in a complex terrain environment, has a zoom lens with an aspheric maximum of 60 times and continuous magnification of 1.2 to 80mm, and achieves the overall process image acquisition, movement point calculation and identification and output of the optical axis fine-tuning system, so that the video image data acquisition of the monitoring area, the automatic processing of the laser tracking image and the continuous tracking of the target at a close distance and wide-range angle are achieved.