Infrared illuminating, zooming and light-condensing lens

Abstract

The invention discloses an infrared illuminating, zooming and light-condensing lens, which is characterized in that a micro array LED (light-emitting diode) light source is arranged on the front focal surface of the light-condensing lens, a fixing group (A), a compensation group (B), a zooming group (C) and a fixing group (D) are sequentially arranged along the direction of near-infrared light transmission, and the compensation group (B) and the zooming group (C) can move correspondingly along an optical axis. Since light emitted by the high-power micro array LED on the image surface of the lens can be projected far, the divergence angle and the light spot size can be changed continuously. When the lens is used with an integrated zooming CCD (charge coupled device) camera, the monitoring and shooting with no blind areas under all weather conditions can be carried out within different distances and different observation target scopes in environments with low light intensity or zero light intensity at dark nights.

Description

technical field [0001] The invention relates to an infrared illumination variable focal length concentrating lens, which is suitable for the field of security monitoring. Background technique [0002] In the field of security monitoring, although low-light CCD camera technology and devices have made great progress, all video surveillance devices still receive high-noise, low-resolution, and low-definition images in low-light environments . At present, LED light sources or lasers are used for near-infrared supplementary lighting in low-light situations; although this has improved the shooting effect in dark night environments to a certain extent, there are still problems in lighting distance, spot size, and power consumption efficiency. Certain limitations. In particular, the divergence angle of LED and other illuminants is large, and the size is fixed. It cannot take into account the change of lighting distance in the range of long and short distances, and the intensity of...

AI Technical Summary

Problems solved by technology

[0002] In the field of security monitoring, although low-light CCD camera technology and devices have made great progress, all video surveillance devices still receive high-noise, low-resolution, and low-definition images in low-light environments

At present, LED light sources or lasers are used for near-infrared supplementary lighting in low-light situations; although this has improved the shooting effect in dark night environments to a certain extent, there are still problems in lighting distance, spot size, and power consumption efficiency. certain limitations

In particular, the divergence angle of LED and other illuminants is large, and the size is fixed. It cannot take into account the change of lighting distance in the range of long and short distances, and the intensity of light cannot be adjusted, which greatly reduces the application effect of lighting and brings great harm to the use. the inconvenience

Images