27/03/2014
IR focus shift achieves image clarity 24/7
Hsinchu, Taiwan
Furthermore, the difference in the lens’ focal length will result in different focal planes. That is, for a vari-focal lens, the image focused in the wide mode has a different focal plane from that focused in the tele mode.
One widely-used technology for addressing this issue is the IR-corrected lens, which minimizes the focal plane difference between the visible light and the IR light via special glass materials and coatings and so on. The IR-corrected lens works well, while not perfect. For example, for a vari-focal IR-corrected lens, the image focused in the wide mode still has a different focal plane from that focused in the tele mode. The IR-corrected lens can produce an improved image overall, but cannot bring a perfectly focused image to both the wide mode and the tele mode.
Brickcom has added intelligence to the camera to further address this issue. When switching from the day mode to the night mode (and vice versa), Brickcom’s IR focus shift function will force the motorized lens to be re-focused, automatically. The IR focus shift function works whether the lens is in the wide mode or the tele mode or anywhere in between. And the user doesn’t need to wait or do anything - it is quickly and automatically done, and, according to Brickom, the result is perfect.
The new IR focus shift function is available in Brickcom’s V5 motorised-lens cameras.