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Aviation mapping camera object lens center type shutter mechanism

A shutter and objective lens technology, applied in the field of aerial cameras, can solve the problems of high motor speed, large proportional coefficient, vibration, etc., and achieve the effect of reducing the number of blades and improving the quality

Inactive Publication Date: 2012-03-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The central shutter has the following defects: because the fast blades 4 and the slow blades 5 rotate in the same direction, the proportional coefficient between the rotating speed of the high-speed motor and the exposure time of the shutter is too large, the shutter efficiency is low, and the motor speed required for a short exposure time is relatively low. High, easy to cause vibration and affect image quality

Method used

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  • Aviation mapping camera object lens center type shutter mechanism
  • Aviation mapping camera object lens center type shutter mechanism
  • Aviation mapping camera object lens center type shutter mechanism

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Embodiment Construction

[0015] The invention according to figure 2 and image 3 The structure shown is implemented. Wherein the material of forward vane 8 and reverse vane 7 all selects high modulus of elasticity carbon fiber (M40) material impact molding for use; One week clutch 32 selects the CB-4 clutch that the model of Shanghai Kabei Company is CB4-CW-24DC-10H9, this The starting and stopping time of this clutch is very short, can bear larger torque, and has self-locking performance; The high-speed motor 39 selects the high-speed motor that the model of Maxon Company is RE30-268214 for use; Motor secondary transmission gear 37, motor primary transmission Gear 45, forward secondary gear 14, forward primary gear 27, reverse secondary gear 18, reverse primary gear 19, and reverse tertiary gear 16 are all made of 1Cr17Ni2 and surface quenched, with a hardness of 28-32HRC. The precision grade is 5-6-5g GB2363-90; the material of the second-stage bevel gear 23 and the first-stage bevel gear 29 is 1...

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Abstract

An aviation mapping camera object lens center type shutter mechanism is disclosed. The invention belongs to the aviation camera technology field and relates to the object lens center type shutter mechanism. The invention aims at providing the aviation mapping camera object lens center type shutter mechanism. The object lens center type shutter comprises a shutter housing. The housing is equipped with a motor transmission mechanism, a one week clutch transmission mechanism, a bevel gear transmission mechanism, a positive gear transmission mechanism, a reverse gear transmission mechanism and a photoelectric signal acquisition mechanism. The motor transmission mechanism drives the bevel gear transmission mechanism to rotate through the one week clutch transmission mechanism so as to drive the positive gear transmission mechanism and the reverse gear transmission mechanism to perform reverse rotation. A positive blade and a reverse blade can realize coaxial reverse rotation. Simultaneously, the signal acquisition mechanism records an exposure signal. Because of the coaxial reverse rotation of the two blades, a shutter efficiency can be greatly increased and a proportion coefficient ofa motor rotating speed and shutter exposure time can be substantially reduced.

Description

Technical field: [0001] The invention belongs to the technical field of aerial cameras, in particular to an objective lens-centered shutter mechanism of an aerial surveying and mapping camera. Background technique: [0002] According to the position in the aerial camera, the shutter is divided into two types: objective lens shutter and focal plane shutter. There are two types of objective shutters: central shutter and louver shutter. The central shutter can expose the photosensitive elements on the image surface at the same time, and the image deformation is small. Aerial surveying and mapping cameras generally adopt this mechanism. The central shutter is generally composed of several circular metal sheets with notches. The metal sheets are installed at the aperture stop of the lens. Each sheet can rotate around its own axis. When the blades are not working, they overlap each other to block the image beam. When the blades rotate respectively, the notch position of each blad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B9/10G03B9/58G01C11/02
Inventor 远国勤丁亚林惠守文刘立国于春风
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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