Patent ID: 9702760
Date: 2017-07-11
CPC Classifications: G01J

Claim:
1. An optical module comprising: a spectroscopic element that selects light of a predetermined wavelength from incident light, and emits the selected light as emitted light, the spectroscopic element being operable to emit light having one of a plurality of wavelengths; a roll shutter imaging element that has pixels which accumulate electric charges while being exposed to the emitted light, and forms one frame by performing a photodetection process for each pixel block including a plurality of the pixels with a predetermined time delay for each pixel block, in which the imaging element accumulates electric charges in the pixels in a photodetection period, and outputs a detection signal in response to the accumulated electric charges in a non-photodetection period subsequent to the photodetection period; and a spectroscopic controller that controls the wavelength change driving of the emitted light in the spectroscopic element, wherein for the one frame, the spectroscopic controller controls the spectroscopic element to start the wavelength change driving at an end timing of the photodetection period of a final pixel block for which the photodetection process is performed at the end.