A sub-millisecond high-reliability central mechanical shutter
A mechanical shutter, millisecond-level technology, applied in shutter, camera, optics, etc., can solve the problems of small image distortion, image distortion, difficult central mechanical shutter, etc., to achieve reliable operation, reduce extra movement time, and simple structure.
Active Publication Date: 2020-12-25
CHANGGUANG SATELLITE TECH CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The curtain shutter can obtain a very short exposure time and high light efficiency at the same time, but the slit of the shutter exposes the image points of the entire image surface one by one, and the exposure time is sequential, so it is easy to cause image distortion when shooting moving objects
The central shutter can expose the photosensitive elements on the image surface at the same time, and the image distortion is small. Aerial surveying and mapping cameras generally adopt this mechanism, but the central mechanical shutter is difficult to achieve a shorter exposure time.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] Such as Figure 1 to Figure 3 As shown: the present invention includes a support frame 3, a shutter movement trigger mechanism, an exposure time adjustment mechanism and an iris assembly; the shutter movement trigger mechanism includes a drive rod 10, a limit block 9, an impact slider 11, a second straight line Guide rail 12, first spring 16, encoder 19, DC geared motor 20. The encoder 19 is installed on the DC gear motor 20, the limit block 9, the DC gear motor 20 and the second linear guide rail 12 are installed on the support frame 3, and the second linear guide rail 12 is positioned by the shoulder provided on the support frame 3; The rod 10 is installed on the DC geared motor 20, and the driving rod 10 is provided with a first hook portion 10a; the impact slider 11 is installed on the second linear guide rail 12, and the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a sub-millisecond high-reliability central mechanical shutter, which includes a support frame, a shutter movement trigger mechanism, an exposure time adjustment mechanism and a variable diaphragm assembly. The drive lever in the shutter motion trigger mechanism is driven by the DC geared motor to move the impact slider to the set distance, and then the drive lever releases the impact slider, and the impact slider drives the blade dial push rod and blade under the action of the first spring The dial rotates in one direction at high speed, and the shutter blades in the iris assembly are driven by the blade dial to rotate in one direction to complete an exposure action. The exposure time adjustment mechanism adjusts the position of the nut bracket through the ball screw, and then adjusts the preload of the first spring to realize the adjustable shutter exposure time. The patented invention has compact structure, wide application range and high reliability, can realize sub-millisecond exposure time, can be applied in the field of aerial surveying and mapping cameras, and can accurately adjust the exposure time and exposure working frequency of the shutter according to requirements.
Description
technical field [0001] The invention belongs to the technical field of mechanical shutters, in particular to a sub-millisecond high-reliability central mechanical shutter. Background technique [0002] There are many types of shutters for aerial photography cameras. According to the position of the shutter installed in the camera, they can be divided into two types: objective lens shutter and focal plane shutter. At present, the most widely used central shutter and curtain shutter belong to objective lens shutter and focal plane shutter respectively shutter. The curtain shutter can obtain a very short exposure time and high light efficiency at the same time, but the slit of the shutter exposes the image points of the entire image surface one by one, and the exposure time is sequential, so it is easy to cause image distortion when shooting moving objects. The central shutter can expose the photosensitive elements on the image surface at the same time, and the image distortio...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G03B9/20
CPCG03B9/20
Inventor 宋可心贾学志张弘治李季丛杉珊
Owner CHANGGUANG SATELLITE TECH CO LTD