A super large target continuous zoom lens for line scan camera system

Abstract

The invention relates to a super-large target surface continuous zoom lens for a line-scan camera system, comprising a front fixed group A with a positive focal power, a zoom group B with a negative focal power, and a compensation group with a positive focal power C. Diaphragm D and the rear fixed group E with negative refractive power, the front fixed group A includes the first cemented group in which the negative meniscus lens A1 and the positive meniscus lens A2 are in close contact, and the positive meniscus lens A3; the zoom group B Including the second cemented group of double-concave lens B1, plano-concave lens B2 and positive meniscus lens B3; the compensation group C includes the third cemented group of double-convex lens C1, negative meniscus lens C2 and double-convex lens C3; the rear fixed group E includes The fourth cemented group of biconvex lens E1 and biconcave lens E2 in close contact, negative meniscus lens E3, the fifth cemented group of plano-convex lens E4 and biconcave lens E5 in close contact, biconvex lens E6, and mirror E7. The invention has a reasonable design, and realizes continuous variable focal length through the movement of the variable magnification group and the compensation group.

Description

Technical field: [0001] The invention belongs to the field of photoelectric technology, in particular to a super-large target surface continuous zoom lens for a line-scan camera system. Background technique: [0002] In the field of industrial photography, the degree of image restoration, image frame rate, and single frame rate information are getting higher and higher. The above requirements lead industrial imaging equipment to develop in the following directions: (1) The size of the detector is getting larger and the effective pixel The number increases, increasing the amount of single frame rate information; (2) The lens has a large amount of light, the exposure time is reduced, and the frame rate is increased; (3) The optical distortion is small, the image restoration degree is high, and because the image processing time is reduced, the frame rate is indirectly improved frequency rate. [0003] Therefore, in the field of linear array imaging, the selected lens must have...

AI Technical Summary

Problems solved by technology

These lenses have their inherent defects. Their field of view is fixed, and they cannot simultaneously provide the functions of zooming in on small targets for detail recognition and complete sampling of large targets. Multiple camera systems must be configured to work at the same time, which in fact requires a larger volume. , higher cost, less adjustability

Images