H04N9/647

Light detecting apparatus and image acquiring apparatus
10704953 · 2020-07-07 · ·

The disclosed technology is directed to a light detecting apparatus used in an image acquiring apparatus. The image acquiring apparatus comprises a light receiving element that outputs a current according to a light amount of incident light. A current-voltage conversion circuit converts the current output from the light receiving element to a voltage signal. The current-voltage conversion circuit includes an operational amplifier and feedback resistance, feedback capacitance, and at least one diode that are connected in parallel between an inverting terminal and an output terminal of the operational amplifier. The diode is connected to have a forward direction from the inverting terminal toward the output terminal, and following conditional expressions are satisfied, G=R.sub.f B=1/(2R.sub.f(C.sub.f+C.sub.d/n)) and V.sub.pr>nV.sub.f>GI.sub.max.

LIGHT DETECTING APPARATUS AND IMAGE ACQUIRING APPARATUS
20190212193 · 2019-07-11 · ·

The disclosed technology is directed to a light detecting apparatus used in an image acquiring apparatus. The image acquiring apparatus comprises a light receiving element that outputs a current according to a light amount of incident light. A current-voltage conversion circuit converts the current output from the light receiving element to a voltage signal. The current-voltage conversion circuit includes an operational amplifier and feedback resistance, feedback capacitance, and at least one diode that are connected in parallel between an inverting terminal and an output terminal of the operational amplifier. The diode is connected to have a forward direction from the inverting terminal toward the output terminal, and following conditional expressions are satisfied, G=R.sub.f B=1/(2R.sub.f(C.sub.f+C.sub.d/n)) and V.sub.pr>nV.sub.f>GI.sub.max.

Color and infrared filter array patterns to reduce color aliasing

Embodiments of a color filter array include a plurality of tiled minimal repeating units, each minimal repeating unit comprising an MN set of individual filters, and each individual filter in the set having a photoresponse selected from among four different photoresponses. Each minimal repeating unit includes a checkerboard pattern of filters of the first photoresponse, and filters of the second, third, and fourth photoresponses distributed among the checkerboard pattern such that the filters of the second, third, and fourth photoresponses are sequentially symmetric about one or both of a pair of orthogonal axes of the minimal repeating unit.