Fast optical shutter using micromirror motion
View Patent ↗The present invention provides a fast optical shutter function by use of the fast movement of the micromirrors. In a micromirror array lens (MMAL), all the micromirrors reflect the incident light to form an image on the image plane. If the micromirrors reflect the incident light out of the optical sensor area, then the optical sensor can not have any optical signal just like the incident light blocked. By just changing the beam path by MMAL motion, the micromirror array lens has a function for optical shutter.
1. A micromirror array lens with fast optical shutter function comprising a plurality of micromirrors wherein the micromirror array lens makes its focus onto image sensor with satisfying converging and same phase conditions while the shutter function is off and wherein each micromirror in the micromirror array lens changes its angle to redirect incident light out of the image sensor while the shutter function is on.
2. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens reflects the incident light out of the sensor when the shutter function is on and the micromirror array lens focuses the incident light on the sensor when the shutter function is off.
3. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens further comprises at least one optical block to absorb the incident light reflected by the micromirror array lens.
4. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens can change its optical axis.
5. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens prevents the image sensor to be over-exposed to light by using fast optical shutter function.
6. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens controls intensity of the incident light by controlling the optical shutter function region by region.
7. The micromirror array lens with fast optical shutter function in claim 1 , wherein the micromirror array lens controls the relative illumination of an imaging system by controlling the optical shutter function of the micromirror array lens region by region.
8. The micromirror array lens with fast optical shutter function in claim 1 , wherein each micromirror motion of the micromirror array lens is random to direct the incident light to random direction out of the image sensor.