6results about How to "High relative illuminance" patented technology

This application discloses an optical lens. The optical lens, along its optical axis from the object side to the image side, sequentially comprises: a first lens with negative optical power, its object side being convex and its image side being concave; a second lens with negative optical power, its object side being convex and its image side being concave; a third lens with negative optical power, its object side being concave and its image side being concave; a fourth lens with positive optical power, its object side being convex and its image side being concave; a fifth lens with positive optical power, its object side being convex and its image side being convex; a sixth lens with negative optical power, its image side being concave; a seventh lens with positive optical power, its object side being convex and its image side being convex; and an eighth lens with positive optical power, its object side being convex. The effective focal length F1 of the first lens and the effective focal length F of the optical lens satisfy: -8.8 ≤ F1 / F ≤ -7.7.

The embodiment of the application discloses a high-definition zoom lens applied to micro-nano high-precision 3D printing, comprising: coaxially arranged lens groups with positive light angles, a diaphragm, a light splitting device, a galvanometer, a protective glass and an imaging surface, wherein the lens groups comprise coaxially arranged first group lenses and second group lenses in sequence, and the diaphragm is located between the first group lenses and the second group lenses. Through the high-definition zoom lens, the printing pixel size can be continuously changed, the lens distortion is small, the relative luminance is high, the light efficiency is high, and the use requirements are met.

The invention provides an AR micro-projection color light machine and near-to-eye display equipment, and relates to the technical field of AR. The optical machine comprises an imaging lens group which comprises a diaphragm, a first lens, a second lens, a third lens and three fourth lenses which are sequentially arranged from an object side to an image side along an optical axis; the color combination prism is an X-cube color combination prism, is arranged between the third lens and the fourth lens, and is used for combining the three-color light path into one color light path for outputting; the image source is arranged on the image side of the fourth lens and used for providing an electronic image; wherein the first lens is a positive lens, the second lens is a positive lens, the third lens is a negative lens, the fourth lens is a positive lens, and the second lens and the third lens are cemented lenses. By constructing an optical framework of the lens and the X-cube color combination prism and through cooperation of all optical elements, full-color display can be achieved, and meanwhile the multiple aspects of performance such as the small size, the large field angle, the excellent optical effect and the high definition are taken into account.

The application discloses a high-resolution optical system for cosmetic removal and color cosmetic detection, comprising seven aspheric lenses, which are a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object plane to an image plane. The application combines positive and negative lenses, reasonably allocates the refractive power of each lens, and makes light transition gently, so that the tolerance sensitivity of the system is significantly reduced, chromatic aberration, spherical aberration, field curvature and distortion are effectively corrected, the resolution and relative luminance are improved, the high-resolution optical system for cosmetic removal and color cosmetic detection has sufficient light flux, high resolution, and unobvious field curvature and distortion, and all the lenses are made of plastic, so that the cost is low and mass production is easy.

This invention provides an all-glass vehicle-mounted day and night confocal optical system and its application camera module, mainly composed of 8 lenses. The first lens has negative optical power, a convex object side, and a concave image side; the second lens has negative optical power, a concave object side, and a convex image side; the third lens has positive optical power, a convex object side, and a concave image side; the fourth lens has negative optical power, a convex object side, and a concave image side; the fifth lens has positive optical power, a convex object side, and a convex image side; the fourth and fifth lenses form a bonded lens; the sixth lens has positive optical power, a convex object side, and a convex image side; the seventh lens has negative optical power and a concave image side; and the eighth lens has optical power and a concave image side. The structure is simple and has advantages such as high resolution, large target area, small size, high relative illumination, and high pixel imaging, improving the uniformity of image illumination and image clarity.

The invention discloses an optical lens, a camera module and terminal equipment, a first lens has positive refractive power, and an object side surface and an image side surface of the first lens are respectively a convex surface and a concave surface. The second lens element with negative refractive power has a concave object-side surface and a concave image-side surface. The third lens element with positive refractive power has a convex image-side surface. The fourth lens element with positive refractive power has a convex object-side surface. The fifth lens element with negative refractive power has a convex object-side surface and a concave image-side surface, respectively. The sixth lens element with positive refractive power has a convex object-side surface. The seventh lens element with negative refractive power has a concave object-side surface. The optical lens satisfies the following relations: FOV is greater than or equal to 34deg and less than or equal to 42deg, and FNO is greater than or equal to 1.5 and less than or equal to 1.65. According to the optical lens, the camera module and the terminal equipment, the requirements of large aperture and high relative illumination can be met while high resolution is met.