High zoom ratio continuous zoom TV camera lens and control method thereof
A camera lens and zoom ratio technology, applied in the lens field, can solve the problems that the resolution of the zoom lens cannot be adapted to the high-definition camera, affect the detection ability of the system, and the observation field of view is small, so as to improve the ability to bear the optical power, Reduce aberrations such as secondary spectrum and small size
Active Publication Date: 2017-08-25
FUJIAN FORECAM OPTICS CO LTD
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[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high zoom ratio continuous zoom TV camera lens and its control method, which overcomes the fact that the resolution of zoom lenses that have been used for decades cannot be adapted to high-definition cameras, And limited by weight and volume, resulting in small observation field of view, small zoom ratio, low image contrast and definition, which seriously affect the detection ability of the system and other defects
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[0027] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.
[0028] Such as figure 1 As shown, a high zoom ratio continuous zoom TV camera lens, the optical system of the lens is provided with a front fixed group A with a positive focal power and a negative fixed group with a focal power along the incident direction of light from left to right in the optical system of the lens. Zooming group B, compensation group C with negative refractive power and rear fixed group D with positive refractive power, the front fixed group A is sequentially equipped with positive crescent lens A-1 and negative crescent lens A-2 with Dental lens A-3 closely connected first cemented group; said variable power group B is provided with biconcave lens B-1 and the second cemented group of biconcave lens B-2 and positive crescent lens B-3 in clos...
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The invention relates to a high zoom ratio continuous zoom TV camera lens and its control method. The optical system is provided with a front fixed group A, a zoom group B, a compensation group C and a rear fixed group D sequentially along the incident direction of light. Fixed group A is sequentially provided with positive crescent lens A-1 and a cemented group consisting of negative crescent lens A-2 and positive crescent lens A-3; variable power group B is sequentially provided with double concave lens B-1 and double concave lens B-1 2 The cemented group closely connected with the positive crescent lens B‑3; the compensation group C is equipped with a cemented group made of double concave lens C‑1 and the positive crescent lens C‑2; Dental lens D‑2, a cemented group of biconvex lens D‑3 and biconcave lens D‑4, a positive crescent lens D‑5 and a cemented group of biconvex lens D‑6 and negative crescent lens D‑7. The lens has the characteristics of compact structure, large observation field of view, large zoom ratio, long detection distance and high resolution.
Description
technical field [0001] The invention relates to a high zoom ratio continuous zoom TV camera lens and a control method thereof for real-time video camera, belonging to the lens field. Background technique [0002] Mechanically compensated continuous focal length lenses are widely used in the field of television photography. The optical structure of traditional mechanically compensated zoom lenses consists of four components: front fixed group, zoom group, compensation group and rear fixed group. There are disadvantages such as large size, low resolution, small zoom ratio, mismatch with high-precision cameras, and poor image quality under low light and weather conditions such as rain, snow, and mist. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high zoom ratio continuous zoom TV camera lens and its control method, which overcomes the fact that the resolution of zoom lenses that have been...
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IPC IPC(8): G02B15/17G02B7/04G03B13/34G03B30/00
CPCG02B7/04G02B15/17G03B13/34
Inventor 肖维军陈潇周宝藏屈立辉刘辉
Owner FUJIAN FORECAM OPTICS CO LTD