15results about How to "Avoid stray light" patented technology

The invention provides a device and a method for testing thermal deformation of a reflector, and relates to the technical field of optical assembly, calibration and detection.The testing device comprises an interferometer, a three-comprehensive test box, a standard plane reflector, first window glass, second window glass and a holographic original, firstly, the thermal deformation of the window glass on the two sides in the three-comprehensive test box is measured; measuring the thermal deformation of the reflector to be measured, analyzing and calculating the surface shape error caused by two times of thermal deformation to obtain the Zernike polynomial coefficient value of the reflector to be measured, and obtaining the surface shape value of the reflector to be measured through fitting analysis, namely the thermal deformation of the reflector to be measured. The problems that in the prior art, the surface shape change condition in the actual load working environment is difficult to accurately measure and the influence of window glass on the reflector to be tested is difficult to accurately measure are solved, the testing precision is improved, and in addition, the surface shape error of the reflector to be tested can be quantitatively analyzed through all Zernike polynomial coefficient values in the testing result.

The utility model belongs to the technical field of medical instruments, and particularly relates to an artificial lens for people with color vision disorder. The surface of the intraocular lens is a spherical surface or at least one surface is an aspheric surface or at least one surface is a discontinuous surface, the intraocular lens is colored and at least uses one coloring dye, and the coloring range of the intraocular lens at least comprises part of an optical area. According to the intraocular lens, at least one inhibition band exists in the wavelength range of 380 nm to 780 nm of the spectrum transmittance of the intraocular lens, and the minimum value of the spectrum transmittance in the inhibition band is lower than the nearest peak value of the spectrum transmittance in the wavelength range of 380 nm to 780 nm, so that the situation that the surface roughness is too high due to film coating is avoided, cell deposition on the surface of a film layer is avoided, the color vision correction safety is improved, and the color vision correction efficiency is improved. The correction effect of color vision correction is guaranteed, the problem that the surface reflectivity is high due to the fact that the surface of the artificial lens is coated with a film is effectively solved, optical interference is prevented, the retina is prevented from receiving stray light, and the signal-to-noise ratio of a retina image is prevented from being reduced.

The utility model relates to a heterogeneous bonding optical waveguide sheet, which comprises an optical waveguide layer made of wide bandgap semiconductor materials and a glass substrate made of high refractive index glass, the optical waveguide layer is arranged on the glass substrate, and a grating structure is arranged on the surface, away from the glass substrate, of the optical waveguide layer. The high-refractive-index glass optical waveguide sheet solves the problems that the refractive index of an existing high-refractive-index glass optical waveguide sheet reaches 2.0, stray light is generated through secondary coupling out and the like, and has the advantages of being high in refractive index, large in FOV, full-color in single sheet and capable of reducing rainbow lines.

The invention provides a reflector thermal deformation testing device and method, and relates to the technical field of optical alignment and detection. The testing device comprises an interferometer, a three-comprehensive test box, a standard plane reflector, a first window glass, a second window glass and a holographic original. Firstly, the thermal deformation of the window glasses on both sides of the three-comprehensive test box is measured, and then the thermal deformation of the reflector to be measured is measured, and the surface errors caused by the two thermal deformations are analyzed and calculated to obtain the Zernike polynomial coefficient value of the reflector to be measured. The surface value of the reflector to be measured is obtained through fitting analysis, which is the thermal deformation of the reflector to be measured. The problem that it is difficult to accurately measure the surface shape change under the actual load working environment and the influence of the window glass on the reflector to be measured in the prior art is solved, and the test accuracy is improved. In addition, the surface error of the reflector to be measured can be quantitatively analyzed through the Zernike polynomial coefficient values ​​of each item in the test result.

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and at least one spacer, and the lens group is composed of seven lenses including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the at least one spacer comprises a fifth spacer and a sixth spacer; f6 / (EP56 + CT6) is greater than or equal to-122.21 and less than or equal to-106.77; and d6s / (R12 / R11) is more than or equal to-3.74 mm <-1 > and less than or equal to-1.73 mm <-1 >. According to the invention, the problem that stray light at the tail end is increased due to the fact that a seven-piece optical imaging lens in the prior art meets low aberration is solved.

This utility model discloses a broadband imaging lens, comprising a lens group disposed inside the lens barrel. The lens group, arranged sequentially along the optical axis from the object plane to the image plane, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, all of which are positive diopter glass spherical lenses. The first lens has a convex object-side surface and a concave image-side surface; the second lens has a convex object-side surface and a concave image-side surface; the third lens has a convex object-side surface and a concave image-side surface; the fourth lens has a convex object-side surface and a concave image-side surface; and the fifth lens has a convex object-side surface and a convex image-side surface. This broadband imaging lens has an EFL of 50mm, a spectral range of 400–1000nm, weighs less than 100 grams, has a center MTF of 32lp / mm > 0.5, and an edge MTF of 32lp / mm > 0.3. It exhibits high image quality, small size, low cost, and the lens head is also waterproof and dustproof.

The utility model provides projection equipment and a projection system, and relates to the technical field of projection, and the projection equipment comprises a housing which is provided with a light-transmitting through hole; the digital micromirror device is installed on the shell, and one side of the digital micromirror device is provided with a first area and a second area surrounding the first area; the first area and at least part of the second area are exposed through the hole opening of the light-transmitting through hole; the light-transmitting through hole is used for allowing light to pass through and be projected on the first area, and the first area is used for reflecting the light; the shading piece comprises a connecting part and a shading part which are connected with each other, and the connecting part is connected to the shell; an opening is formed in the connecting part, at least part of the shielding part is exposed through the opening, and the shielding part is used for absorbing light; in the projection direction of the light, the projection of the shielding part on the digital micromirror device covers at least part of the second area, and the first area is exposed through the opening. According to the projection equipment and the projection system, the imaging quality of the projection equipment and the working reliability of the DMD device can be improved.

The utility model discloses an optical imaging system, which comprises a lens barrel, a lens group and a spacing element group, and is characterized in that the lens group comprises a first lens, a second lens, a third lens, a fourth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis, the effective focal lengths of the first lens, the second lens and the fifth lens are negative, and the effective focal lengths of the third lens, the fourth lens and the sixth lens are positive; the spacer element group includes a fourth spacer element located on the image side of the fourth lens and abutting against the image side surface portion of the fourth lens, and a fifth spacer element located on the image side of the fifth lens and abutting against the image side surface portion of the fifth lens. The distance EP45 between the fourth and fifth spacing elements on the optical axis, the air interval T56 between the fifth and sixth lenses on the optical axis, the outer diameter D4m of the image side surface of the fourth spacing element, the inner diameter d5s of the object side surface of the fifth spacing element and the effective focal length f5 of the fifth lens meet the following conditions: 2.5 lt; eP 45 / T56lt; 5.5, and-2lt; (D4m-d5s) / f5lt; and-0.5.

This utility model discloses a light source module and a fiber optic scanning display device. The light source module includes: a light source; a pigtail disposed in the outgoing light path of the light source; the pigtail includes a fiber optic fixing structure and a fiber; the fiber protrudes from the end face of the fiber optic fixing structure, and the fiber coupling end face is an inclined end face. In the above solution, by having the fiber protrude from the end face of the fiber optic fixing structure, stray light caused by the adhesive used to bond the fiber can be avoided, thereby reducing image stripes and noise caused by the back-propagation of stray light into the laser, thus alleviating the technical problem of image quality defects existing in the prior art and achieving the technical effect of improving image quality.

The embodiment of the utility model belongs to the technical field of lighting equipment, and relates to a light-emitting assembly and a ceiling lamp. The light-emitting assembly comprises an LED light source, a reflection cup and a light-transmitting lens; the LED light source is arranged at the bottom of the reflection cup, a light outlet is formed in the end, away from the LED light source, of the reflection cup, the LED light source forms a light outlet direction in the direction facing the light outlet, and the light-transmitting lens is arranged in the light outlet direction of the LED light source and spaced from the LED light source. The side face, facing the LED light source, of the light-transmitting lens is a plane or a curved face. The light emitting assembly can be effectively prevented from generating stray light during light emitting, and therefore the light emitting effect of the light emitting assembly is improved.

The invention discloses a pick-up lens, and the pick-up lens comprises a lens cone, and a lens group and a bearing member group which are disposed in the lens cone. The lens group sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from the object side to the image side along the optical axis; the bearing piece group comprises a first bearing piece which is arranged on the image side of the first lens and is at least partially contacted with the image side surface of the first lens, and a second bearing piece which is arranged on the image side of the second lens and is at least partially contacted with the image side surface of the second lens; the maximum height L of the lens barrel in the optical axis direction and the maximum half field angle Semi-FOV of the camera lens meet the following conditions: 4.4 mmlt; l * tan (Semi-FOV) lt; 5.8 mm in diameter; the effective focal length f2 of the second lens, the inner diameter d2s of the object side surface of the second bearing piece and the inner diameter d1m of the image side surface of the first bearing piece meet the following conditions: 3.6 mmlt; f2 / (d2s / d1m) lt; the thickness is 5.0 mm.

The embodiment of the invention provides an eyeball tracking device and tracking method of intelligent head-mounted equipment and the intelligent head-mounted equipment. The eyeball tracking device comprises a flexible frame body, a contact and a data processing unit; the flexible frame can be attached to the periphery of the eye; the contacts are arranged on the flexible frame body and extend towards the eyeballs, coils are arranged on the contacts, the contacts can make contact with the skin around the eyes and can be driven by the skin and muscles to deform along with movement of the eyeballs, so that deformation of the coils is triggered, and then a resistance value array [R1, R2,..., RN] formed by the coils is changed, n is the number of the coils and is greater than or equal to 3; and the data processing unit is used for receiving the resistance value arrays [R1, R2,..., RN] corresponding to the deformation of each coil, and converting the received resistance value arrays [R1, R2,..., RN] into eyeball watching positions [X, Y, Z] according to a preset function mapping relation.

The utility model provides a reflecting cover which comprises a shell and a cover body structure arranged in the shell. Wherein the cover body structure is a deep drawing structural part formed by an aluminum base material composite reflecting sheet or a laser welding structural part formed by the aluminum base material composite reflecting sheet, so that the reflecting surface of the cover body structure is in a circumferential continuous form. The deep drawing structural part is of an integral hollow structure, splicing gaps in the axial side face can be completely eliminated, light is prevented from leaking from the gaps or stray light is prevented from being generated, it is ensured that the light is directionally reflected through the light reflecting face, and the light efficiency utilization rate is increased. According to the laser welding structural part, the splicing gap of the aluminum base material composite reflector can be controlled to be in the micron order, the effect is close to the seamless effect of the axial side face, the risk of light leakage is remarkably reduced, and the lighting effect treatment effect of the reflector is improved.

According to the diffraction optical waveguide provided by the invention, the first magnetic coating and the second magnetic coating which are different in magnetism are arranged on the opposite surfaces between the waveguide sheet and the cover plate of the diffraction optical waveguide, and the contact mode of the waveguide and the cover plate is changed through the mutual exclusion effect between the first magnetic coating and the second magnetic coating; the cover plate is restored to an original state, and long-term use of the diffraction optical waveguide is facilitated; meanwhile, the first magnetic coating and the second magnetic coating are divided into a plurality of areas, the refractive indexes of the areas are different, and particularly, the refractive indexes of the coatings of internal and external orthographic projections in the grating structure area are different, so that on one hand, the contact form of the existing grating area and the cover plate is changed to avoid the Newton ring phenomenon, and on the other hand, the structure is simple. The influence of the arrangement of the coating on the total reflection of light in the waveguide is considered, the display uniformity and brightness are improved by limiting the refractive indexes of different areas on the premise of ensuring the display effect of the diffractive optical waveguide, and the visual imaging effect of eyebox is ensured.

The utility model provides a novel LED daytime running lamp which comprises a lampshade and a lamp shell, the lampshade and the lamp shell are connected in a sealed mode to form a cavity, a reflector assembly and a decoration frame are arranged in the cavity, and the decoration frame is located in front of the reflector assembly. The reflector assembly comprises a reflector of a side light-emitting structure, the reflector comprises an upper side face, a lower side face, a left side face, a right side face and a side light-emitting reflecting face, and strip-shaped patterns are arranged on the left side face, the right side face and the lower side face respectively. The lampshade is an integrated piece and comprises a main body protruding forwards and a first turned edge extending outwards, and the first turned edge is arranged at the bottom of the main body; the decorative frame is an integrated piece and comprises a frame body and a second turned edge, the second turned edge is arranged at the bottom of the frame body, when the decorative frame is arranged in the cavity, the frame body is located in the main body and used for shielding the peripheral side faces of the main body, and the second turned edge is located in front of the reflecting mirror and used for shielding the peripheral edges of the reflecting mirror; according to the utility model, the problems in the prior art can be effectively solved.