282results about How to "Increase chromatic aberration" patented technology

An illumination device for use with a product inspection machine inspecting products according to at least one characteristic. The invention also pertains to an illumination device for use in sorting machines that optically sort or separate nonstandard fungible objects from standard objects as they pass a viewing station by viewing such objects illuminated by at least one wavelength. The invention includes a plurality of arrays of semiconductor light sources impinging on passing product and at least one array of semiconductor light sources of wavelength and intensity equal to the plurality of arrays impinging on a background surface for detection and comparison.

The invention provides a metal salt-free sealing agent for an aluminum alloy anodic oxide film, belonging to the technical field of aluminum alloy anodic oxide film post treatment. The sealing agent of the invention is prepared by water solution composed of 1.0-10g/L of a hydration accelerator, 0.01-2g/L of a wetting agent, 0.01-3g/L of an ash inhibitor and 1-15g/L of a pH buffering agent, wherein the pH of workpiece fluid is 5.5-6.5, the operating temperature is 70-90 DEG C, and the sealing speed is 1.0-2.0min/um. The metal salt-free sealing agent creatively adopts organic compounds which are easily subject to biodegradation, does not contain any metal ions of nickel, cobalt, magnesium, calcium, lithium and the like as well as fluorinions, and obtains satisfactory sealing effect of the nano-pores of the aluminum alloy anodic oxide film by virtue of the scientific and coordinated component formula of the water solution; the aluminum alloy anodic oxide film obtained by seal treatment through the sealing agent has the advantages of good corrosion resistance, capability of meeting the requirements of GB 14952.1-94, good light-protection and color-protection properties of a film layer, no ash and pruina, no water stain after drying as well as light flowing color and small color difference change in case of sealing the organic dyeing film; and the metal salt-free sealing agent is widely applicable to sealing treatment of an original-color anodic oxide film, an electrolytic coloring anodic oxide film, a hard oxide film and a dyeing anodic oxide film.

The invention provides a low-cost refracting-reflecting athermalizing medium wave infrared lens and aims at providing a low-cost refracting-reflecting optical lens which is small in aspherical mirror number, low in cost, made of a small amount of aspherical lenses and conventional silicon and germanium optical materials at a 3.7-4.8 [mu]m medium-wave infrared band and having the optical passive athermalizing performance. The technical scheme is that parallel light enters a main reflection spherical mirror (3) to form a converged light beam through a spherical cover (2) in an incidence mode, a convergence angle is decreased through a Mangin refracting-reflecting mirror (4), a primary mirror face (5) is formed by decreasing a part of aberration and increasing a part of balanced aberration and negative thermal difference of a lens to be arranged behind, the light beam is changed into divergent light, the divergent light enters a negative lens (6) made of an aspherical germanium material and a positive meniscus lens (7) made of a silicon material so as to reduce chromatic aberration and aberration, then converges through a positive convex lens (8) made of the silicon material, enters a detector window (9) and finally forms an image on a detector focal plane (11) through a cold light diaphragm (10), and the whole imaging process is finished.

Disclosed is a wide-angle lens having a viewing angle of more than 130°. The wide angle lens has a front group, an aperture, and a rear group arranged in this order from an object side to an image side. The front group has a first lens as a negative lens, a second lens as a negative lens, and a third lens as a positive lens arranged from the object side to the image side. The rear group is a cemented lens having a positive power when two lenses are bonded to each other. The wide-angle lens constitutes an image forming system with the five lenses as a whole, the first lens and the second lens of the front group are aspherical lenses, and the third lens is a spherical lens.

A dental instrument 1 adapted for performing osteotomy includes a mounting shank 2 and, in line therewith, a working portion 3 including cutting zones 3A, of which at least part is covered by a coating of carbon-enriched tungsten carbide except for a plurality of annular bands 10 distributed along the length of the working portion to indicate the depth of penetration of the tool into a portion of jaw.

An LCD device includes a plurality of pixels arranged in a matrix. Each pixel includes a first sub-pixel and a second sub-pixel. Each of the first and second sub-pixels includes a liquid crystal capacitor and a storage capacitor. A capacitance ratio of the liquid crystal capacitor to the storage capacitor in the first sub-pixel is smaller than that in the second sub-pixel. In a first pixel and a second pixel among all the pixels, the first sub-pixel of the first pixel and the first sub-pixel of the second pixel are staggered, and the second sub-pixel of the first pixel and the second sub-pixel of the second pixel are staggered.

The present disclosure provides an electronic sight comprising a lens assembly, an image sensor, a processor, a memory, a touch screen, an information acquisition device, a night vision device, a laser ranging device, a video recorder and a Global Positioning System (GPS). The disclosure also provides a method for calibrating the reticle. A plurality of devices are highly integrated on the electronic sight to achieve a plurality of different functions including automatic adjusting magnification, night vision, providing optimal shooting image and laser ranging. The calibration method disclosed in the present invention comprises simulative calibration and pre-shooting calibration, which avoids wasting bullets in a situation that the point of impact cannot be identified after first shot. Reticles can be adjusted in real-time, achieving the same technical effect as non-polar reticles.

A three-dimensional display apparatus including a pair of polarized glasses having first and second circularly polarized eyeglass with different polarization directions, a display panel displaying a linearly polarized image, a third quarter-wave plate and a patterned half-wave plate is provided. The first circularly polarized eyeglass has a first quarter-wave plate and a first half-wave plate. The second circularly polarized eyeglass has a second quarter-wave plate. The angle between polarization direction of the linearly polarized image and optical axis of the third quarter-wave plate is 45 degrees. The angle between optical axis of the first quarter-wave plate and optical axis of the third quarter-wave plate is 90 degrees. The angle between optical axis of the first half-wave plate and optical axis of the patterned half-wave plate is 90 degrees. The angle between optical axis of the second quarter-wave plate and optical axis of the third quarter-wave plate is 55-125 degrees.

A liquid crystal display device of multi-domain vertically-oriented mode is prepared as packing a liquid crystal layer between top and bottom base plates, forming common electrode with slit on surface of top base plate, setting multiple sub-pixel region in display region of bottom base plate, arranging pixel electrode with slit in sub-pixel region, dividing said sub-pixel region to be two regions with certain area and setting gap between common electrode and pixel electrode on at least two regions are different from each other.

A zoom lens comprises a plurality of lens units including a first lens unit disposed most adjacent to an enlargement side and having negative refractive power, wherein one or more lens units of the plurality of lens units are moved in the direction of the optical axis thereof during magnification change, and wherein the first lens unit includes a 1-1st lens unit comprising at least one lens of negative refractive power and moved during focusing and a 1-2nd lens unit having positive refractive power, and fixed during focusing.

A base image is created from RGB image signals. A B/G ratio between the B image signal and the G image signal is calculated, and a G/R ratio between the G image signal and the R image signal is calculated. A frequency component-enhanced image in which a frequency component corresponding to an abnormal part different from a normal part is enhanced is generated based on the base image. A composition ratio which indicates the ratio for composing the frequency component-enhanced image with the base image is set based on the B/G ratio and the G/R ratio. The frequency component-enhanced image is composed with the base image at the set composition ratio to generate a structure-enhanced image in which the structure of the abnormal part is enhanced.

The invention provides a wide-angle camera lens with an aspherical cemented lens. The wide-angle camera lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence from an object space to an image space, wherein the first lens, the second lens and the fourth lens have negative focal power, the third lens and the fifth lens have positive focal power, the fourth lens and the fifth lens are adhered together to form a cemented lens with the positive focal power, an adjoining plane of the cemented lens is at least a quadratic or above aspherical surface, the condition that BFL (Back Focal Length)/EFL (Effective Focal Length) is not smaller than 3.0 is also satisfied, BFL is a distance from an outermost point at the image space of a fifth lens element ofthe wide angle camera lens to an imaging plane, and EFL is a focal length value of the wide angle camera lens. The wide-angle camera lens can be used for realizing characteristics of a wide angle, small distortion, a large relative aperture, an ultra-long TTL (Total Length of Lens) and BFL under the condition of lower cost, and ensuring a comparatively perfect imaging definition within a wider temperature range, and is particularly suitable for outdoor monitoring under a relatively hostile environment and a vehicle-mounted camera system.

A method for colorization of images is presented. The method comprises the following steps: Displaying an image (102); applying multiple color markings (at least two colors are different) to the displayed image (104); automatically coloring the image by applying a constrained optimization to a cost function that is responsive to the marked colors and the intensity differences of the neighborhoods of some of all of the pixels (106); the resultant image is subsequently stored (110), displayed (108), or transferred (112).

A zoom lens system including, in order from an object side to an image side, a first lens unit of positive optical power, and a second lens unit of negative optical power, followed by a lens component having a lens unit, wherein at least one of the first lens unit and the second lens unit moves during zooming. One of the lens units of the zoom lens system includes a layer made of a material that satisfies the following conditions:

11<νIT<27

0.2<θIT<0.4.

Wherein νIT is an Abbe number of the layer, and θIT is a partial dispersion ratio for the g-spectral line and f-spectral line of the layer. The layer has an optical power of a sign opposite to that of the lens unit including the layer.

The process of dyeing and finishing covered yarn fabric includes the steps of preparing gray cloth, singeing, boiling and rinsing in an overflow dyeing machine, finishing, mercerizing, dyeing or whitening, finishing and full decatizing. The process has combined overflow processing and open width processing, and includes overflow boiling and rinsing step, overflow dyeing step and other open width steps. Compared with conventional all open width process, the present invention has improved less dyeing defects, less color difference and improved hand feeling; and compared with common overflow process, the present invention has increased mercerizing treatment, raised fabric vividness and color fastness, and improved visual quality of the fabric.

The invention discloses an image display apparatus. The image display apparatus comprises a display screen, and an ocular-side double-convex lens, a reflection element and a first achromatic lens which are disposed on an image light transmission optical path of the display screen, wherein the first achromatic lens is coaxially arranged with the ocular-side double-convex lens and is disposed at the light- emitting side of the ocular-side double-convex lens, an optical axis of the display screen and an optical axis of the ocular-side double-convex lens form a preset included angle, the reflection element is disposed between the display screen and the ocular-side double-convex lens, and image light is reflected on the reflection element, sequentially penetrates the ocular-side double-convex lens and the first achromatic lens, and then reaches a watching side so as to form a virtual image. The invention further discloses a head-mounted display device. According to the formed optical system, the system space volume can be reduced, compressed and amplified, a series of image errors such as coma, astigmation, aberration and the like can be improved, the magnitude of distortion is controlled, and under the condition that viewers can see amplified virtual images with excellent image quality, the requirements of a conventional head-mounted display device for miniaturization and light-weight design are satisfied.

The invention discloses a picture watermark adding method. The method comprises the following steps of extracting the gray value of each pixel point in a region wherein a watermark needs to be added, and calculating the average gray value of the region with the watermark to be added, wherein a target picture is adopted as a picture with the watermark to be added; according to the average gray value of the region with the watermark to be added, determining the color type of the watermark to be added; adding the watermark corresponding to the color type of the watermark to be added into the region with the watermark to be added. The invention also discloses a mobile terminal and a computer readable storage medium. According to the invention, the watermark in each picture is effectively ensured to be clearly visible. Therefore, the user experience and the copyright protection strength of the picture are improved.

The invention discloses a lens module, which consists of four optical lenses. The lens module comprises a first optical lens group and a second optical lens group. The first optical lens group comprises first optical lenses with negative diopter. Each first optical lens is provided with a first surface and a second surface, wherein the first surface faces an amplification side; the second surface faces a reducing side; at least one of the first surface and the second surface is a non-spherical surface. The second optical lens group is configured between the first optical lenses and the reducing side, and moreover, the second optical lens group comprises second optical lenses, third optical lenses and fourth optical lenses which are arranged in sequence from the amplification side to the reducing side. The diopter of the second optical lenses, the diopter of the third optical lenses and the diopter of the fourth optical lenses are positive, negative and positive in sequence, and moreover, at least two of the second optical lenses, the third optical lenses and the fourth optical lenses respectively comprise non-spherical surfaces. Moreover, the effective focal length of each third optical lens is f3, and the refractive index is Nd3, whereas the effective focal length of each fourth optical lens is f4. Moreover, the lens module meets the formula as follow: the absolute value of f3/(f4*Nd3) is greater than 0.45 but is less than 1.2.