Broadband infrared endoscopic macro optical lens for optical fiber bundle

Abstract

The invention belongs to the field of optical imaging, and provides a broadband infrared endoscopic macro optical lens for an optical fiber bundle. The lens comprises an object plane, a first convex meniscus lens sheet, a first concave meniscus lens sheet, a system diaphragm, a second convex meniscus lens sheet and an image plane which are sequentially arranged on the same optical axis, the frontsurfaces and the rear surfaces of the first convex meniscus lens sheet, the first concave meniscus lens sheet and the second convex meniscus lens sheet are spherical surfaces, and the image plane adopts an optical fiber bundle end surface. On the basis of only using the most common infrared material and the most common spherical lens, the optical system can solve the problems of wide spectral bandand difficult chromatic aberration correction, can meet the matching of optical fiber bundles, and can achieve extremely high imaging quality, and in addition, the whole lens also has the advantagesof small size, large object-to-image ratio and the like.

Description

technical field [0001] The invention belongs to the field of optical imaging, and in particular relates to a wide-band infrared endoscopic macro optical lens for optical fiber bundles. Background technique [0002] In modern industrial and medical applications, more and more attention is paid to the equipment for short-distance small spaces. The endoscopy system shows its unique role in the narrow spaces that people or general machinery and equipment cannot enter, especially in the medical field. Surgery under the speculum is gradually replacing general surgery. However, since most endoscopic systems widely used now use visible light as the light source for detection and imaging, visible light can only obtain information on the surface of objects, and cannot go deep into the interior of objects. In medical terms, it is impossible to distinguish tiny lesions or have no obvious difference from the surface of normal tissues. It is impossible to see through the occlusion of the...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the working band of the existing endoscopic macro optical system cannot cover the 4.8-9.5 μm frequency band and the chromatic aberration correction is difficult, the present invention provides a wide-band infrared endoscopic macro optical lens for optical fiber bundles, using the end face of the optical fiber bundle As the lens image surface, only the most commonly used infrared materials and the most common optical element surface are used to cover the 4.8-9.5μm frequency band, taking into account the problem of matching with the fiber bundle, and can achieve extremely high imaging quality. It has the advantages of small size and large object-to-image ratio

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