Active temperature/pressure-compensating real-time transmission type aerophotographic camera lens

Abstract

The invention relates to an active temperature / pressure-compensating real-time transmission type aerophotographic camera lens. The lens is characterized in that: the focal length is 650mm, the F number is 8, and the field of view is 5.5 degrees. The lens comprises a front group, a middle group, a diaphragm (8), a focusing lens (9) and a rear group, and all the lenses are sequentially arranged on the same optical axis. By adjusting the focusing lens (9), the change of the focal plane caused by temperature and pressure can be compensated, consequently, wide-temperature, low-pressure operation can be realized, and imaging quality can be ensured; the temperature regulation range is between negative 60 DEG C and 60 DEG C; and the pressure regulation range is 0 to 1 atmosphere standard. The invention does not need an additional constant-temperature or temperature controller and an additional constant-pressure or pressure controller, consequently, the weight and size of a camera are reduced, and meanwhile, the energy requirement of the camera system on a platform is reduced.

Description

Technical field [0001] The invention relates to a real-time transmission type aerial photography camera accessory, in particular to a real-time transmission type aerial photography camera lens with active temperature and pressure compensation. Background technique [0002] Among the current aerial photography cameras, the traditional film aerial photography dominates, but film aerial photography has many shortcomings: (1) The printing process consumes a lot of time and manpower, and the film storage and maintenance is troublesome; (2) Must Scan input is required before computer processing is performed, which is time-consuming, difficult to analyze data in time, and may damage the film; (3) The film's photosensitive layer and its spectral characteristics limit its ability to obtain information; (4) The quality of the captured image And whether the exposure parameters used are suitable cannot be directly confirmed and checked in real time; (5) The processing time period is long and...

AI Technical Summary

Problems solved by technology

[0002] Among the current aerial photography cameras, the traditional film-type aerial photography still dominates, but the film-type aerial photography has many shortcomings: (1) the printing process consumes a lot of time and manpower, and the film storage and maintenance are troublesome; (2) must It is time-consuming, difficult to analyze the data in time, and may damage the film; (3) the photosensitive layer of the film and its spectral characteristics limit its ability to obtain information; (4) the quality of the captured image The appropriateness of the exposure parameters used cannot be directly confirmed and checked in real time; (5) The processing time period is long and the processing process is complicated

(6) In particular, the real-time performance is poor, and it is difficult to meet the current time period from image acquisition to application

[0006] Since the pressure on the flying platform decreases with the increase of altitude, and the higher the altitude, the more serious the non-linearity. Therefore, the traditional camera system usually uses constant pressure or pressure control devices to ensure the normal operation of the system. These constant pressure or pressure devices will greatly increase the weight and weight of the system. volume

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