2results about How to "High telecentricity" patented technology

The application discloses a large-view-field telecentric optical imaging system for a chip overlay system and relates to the technical field of optical imaging systems; the system comprises a diaphragm, a first light-splitting prism, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a second light-splitting prism and an image plane, and the diaphragm, the first light-splitting prism, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the second light-splitting prism and the image plane are sequentially arranged along an optical axis from an object side to an image side. The large-view-field telecentric optical imaging system for the chip overlay system has the advantages of a large field of view, a long object distance, high telecentricity on the object side and low distortion; the incident surface and the emergent surface are loaded with light-splitting prisms matched with multiple functional interfaces, and can simultaneously satisfy functions such as light source illumination, self-focusing and high-resolution imaging.

This invention relates to the field of optical lens technology and discloses a glass-plastic hybrid high-definition scanning imaging system, comprising: a first lens, a second lens, a third lens, and a fourth lens arranged sequentially from the object side to the image side. The object side and image side of the second lens are spherical, while the object side and image side of the first, third, and fourth lenses are aspherical. The first lens has negative refractive power, and its object side is convex at the paraxial position. The second lens has positive refractive power, and its object side is convex. The third lens has negative refractive power, and its image side is concave. The fourth lens has negative refractive power, and its object side is concave at the paraxial position, while its image side is convex at the paraxial position. An aperture is also included. This invention is a four-lens system, combining the surface structure of each lens with the optimal range of optical parameters. It can maintain high resolution and low distortion imaging quality in an extremely simplified structure. The cost of the hybrid combination of glass and plastic lenses is significantly lower than that of an all-glass lens solution.