Presentation Information
[21p-D902-16]Realization of CMOS image sensor for simultaneous visualization of multiple wavelengths distribution
〇(DC)Tomoya Ide1, Yong-Joon Choi1, Murakami Kensuke1, Yasuyuki Kimura1, Takeshi Hizawa1, Kazuhiro Takahashi1, Hiromu Ishii1, Toshihiko Noda1, Kazuaki Sawada1 (1.Toyohashi Univ.)
Keywords:
fluorescence imaging,Simultaneous imaging of multiple wavelength,CMOS image sensor
In this paper, we propose a new simultaneous imaging of multiple wavelengths using a filter-free optical sensor. In conventional fluorescence imaging, devices need to be replaced for each wavelength, making it difficult to observe multiple regions simultaneously. Therefore, we proposed a structure that simultaneously reads the currents on the surface and the backside of the sensor. This allows the wavelength to be identified using the current ratio based on the difference in the optical absorption characteristics of each wavelength. An image sensor with this structure was designed and fabricated at our university, and its light intensity and wavelength characteristics were evaluated and calibrated using an LED light source. It was also confirmed that when irradiated with a spot, the light intensity and wavelength responses were obtained from only the pixels in the spot. Furthermore, two types of fluorescent beads were placed on the sensor and excited using two different light sources and successfully imaged different wavelength distributions. Simultaneous imaging of multiple wavelengths was demonstrated using the wavelength image sensor proposed and fabricated from the above.