11 Apr 2019 The F15-300mm zoom lens is mainly used in visible light band to detect specific targets or regions and transmit TV images and focal length information in real time.
The F15-300mm zoom system is composed of visable light zoom lens,control circuit board and power supply circuit board.The visable light zoom lens include CCD,optical lens,diaphragm,potentiometer,micro-dc motor ,CAM and other structural parts.
Zoom lens system is an optical system in which the focal length changes with in a certain range and the image plane remains fixed.In general, the relative aperture is constant during zoom.For imaging system,continuous zoom optical system is the best way to solve the problem of large field search and small field resolution.The ratio of the two ultimate focal length in the zoom range,namely the ratio of the long focal length to the short focal length,is called magnification ratio,also known as multiplier.In consideration of the secondary spectrum requirements,the plan of the small relative aperture of the long focal length is adopted(that is ,the relative aperture also changes during the zoom process). |
