| 摘要 |
The invention relates to optical and -electronic instrument production, namely to objectives, and may be used as an objective of a small-sized night vision device (NVD) working with Image intensifier tube (IIT) or with CCD matrix.Fast lens objective, includes two positive meniscuses inverted by convex surfaces to space of subjects, a negative lens, the lens which has been stuck together from biconcave and biconvex lenses, a positive lens and a meniscus. Innovative technology consists in that the negative lens is executed as a meniscus inverted by a convex surface to space of subjects, and the meniscus inverted by a convex surface to space of subjects, is executed from biconvex and biconcave lenses, stuck together and optical efficiency does not exceed 0.15 optical efficiency of an objective, and thickness of a meniscus is not less than 0.2 focal length of an objective.The offered design of an objective allows to improve quality of the image on a field in a wide spectral range, and an increase of a back working segment allows to place an objective conveniently in a structure of the device. |
