Demonstration of implantable CMOS image sensors for functional brain imaging. - Kiyotaka Sasagawa; Yoshinori Sunaga; Makito Haruta; Takahiro Yamaguchi; Hironari Takehara; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

An implantable image sensor with self-reset function for brain imaging. - Kiyotaka Sasagawa; Takahiro Yamaguchi; Makito Haruta; Yoshinori Sunaga; Hironari Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

An implantable green fluorescence imaging device using absorption filters with high excitation light rejection ratio. - Yoshinori Sunaga; Makito Haruta; Takahiro Yamaguchi; Mayumi Motoyama; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (BioCAS, 2014)

Hemodynamic imaging using an implantable self-reset image sensor. - Kiyotaka Sasagawa; Takahiro Yamaguchi; Makito Haruta; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2016)

Fabrication and in vivo demonstration of microchip-embedded smart electrode device for neural stimulation in retinal prosthesis. - Toshihiko Noda; Shinya Nishimura; Yukari Nakano; Yasuo Terasawa; Makito Haruta; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (BioCAS, 2017)

Fluorescence imaging device with an ultra-thin micro-LED. - Kiyotaka Sasagawa; Makito Haruta; Koki Fujimoto; Yasumi Ohta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2017)

Parylene-based flexible imaging device for physiological measurement of rodent brain. - Takahiro Yamaguchi; Hajime Hayami; Yoshinori Sunaga; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Jun Ohta (IEEE SENSORS, 2017)

CMOS-based opto-electric neural interface devices for optogenetics. - Takashi Tokuda; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta (MWSCAS, 2017)

Stimulator Design of Retinal Prosthesis. - Jun Ohta; Toshihiko Noda; Kenzo Shodo; Yasuo Terasawa; Makito Haruta; Kiyotaka Sasagawa; Takashi Tokuda (IEICE Trans. Electron., 2017)

Implantable Microimaging Device for Observing Brain Activities of Rodents. - Jun Ohta; Yasumi Ohta; Hiroaki Takehara; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Makito Haruta; Takuma Kobayashi; Yasemin M. Akay; Metin Akay (Proc. IEEE, 2017)

Battery-Free. Sticker-Like, Device for Health Monitoring, Operated by Optical Power Transfer. - Wuthibenjaphonchai Nattakarn; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Takashi Tokuda; Mohamad Sawan; Sandro Carrara; Jun Ohta (BioCAS, 2018)

Excitation and Emission Filters for Implantable Fluorescence Imaging Devices by Laser Lift-Off Process. - Kiyotaka Sasagawa; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (BioCAS, 2018)

Live Demonstration: IoT micronode with optical ID transmission capability operated by optical energy harvesting. - Takashi Tokuda; Wuthibenjaphonchai Nattakarn; Takaaki Ishizu; Makito Haruta; Toshihiko Noda; Kiyotaka Sasagawa; Jun Ohta; Mohamad Sawan (ISCAS, 2018)

Compact Lensless Fluorescence Counting System for Single Molecular Assay. - Hironari Takehara; Yuta Nakamoto; Narihito Ikeda; Kiyotaka Sasagawa; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (IEEE Trans. Biomed. Circuits Syst., 2018)

Live Demonstration: Lensless Highly Sensitive Fluorescence Imaging. - Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Mamiko Kawahara; Makito Haruta; Jun Ohta (BioCAS, 2019)

Multispectral Near-infrared Imaging Technologies for Nonmydriatic Fundus Camera. - Hironari Takehara; Hirofumi Sumi; Wang Ze; Takahiro Kondo; Makito Haruta; Kiyotaka Sasagawa; Jun Ohta (BioCAS, 2019)

A Thin Composite Emission Filter and Fiber Coupled Laser Excitation for Implantable Fluorescence Imager Application. - Erus Rustami; Kiyotaka Sasagawa; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (ISCAS, 2019)

Miniaturized CMOS imaging device for implantable applications. - Kiyotaka Sasagawa; Makito Haruta; Yasumi Ohta; Hironari Takehara; Jun Ohta (VLSI-DAT, 2020)

Needle-Type Imager Sensor With Band-Pass Composite Emission Filter and Parallel Fiber-Coupled Laser Excitation. - Erus Rustami; Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Makito Haruta; Toshihiko Noda; Takashi Tokuda; Jun Ohta (IEEE Trans. Circuits Syst. I Fundam. Theory Appl., 2020)

Implantable CMOS image sensor with a neural amplifier for simultaneous recording of optical and electrophysiological signals. - Kenji Sugie; Kiyotaka Sasagawa; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2021)

Micro-LED Array-Based Photo-Stimulation Devices for Optogenetics in Rat and Macaque Monkey Brains. - Yasumi Ohta; Mark Christian Guinto; Takashi Tokuda; Mamiko Kawahara; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Hirotaka Onoe; Reona Yamaguchi; Yoshinori Koshimizu; Kaoru Isa; et al. (IEEE Access, 2021)

Development of Compact Readout Device for Neural Observation System using Fluorescence Imaging and Fast-scan Cyclic Voltammetry. - Ronnakorn Siwadamrongpong; Nicha Sato; Kenji Sugie; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Kiyotaka Sasagawa; Jun Ohta (EMBC, 2022)

Mouse Brain Imaging Using a Self-Reset CMOS Image Sensor over 70-dB SNR. - Kiyotaka Sasagawa; Pakpuwadon Thanet; Mark Christian Guinto; Yasumi Ohta; Makito Haruta; Hironari Takehara; Hiroyuki Tashiro; Jun Ohta (MWSCAS, 2022)

Clear Fundus Images Through High-Speed Tracking Using Glare-Free IR Color Technology. - Motoshi Sobue; Hirokazu Takata; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Kiyotaka Sasagawa; Ryo Kawasaki; Jun Ohta (J. Robotics Mechatronics, 2022)

Front-light Structure for a Lensless Fluorescence Imaging Device with a Hybrid Emission Filter. - Kiyotaka Sasagawa; Yuki Ito; Daniel Schaeffer; Yoshinori Sunaga; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2023)

Thin and Scalable Hybrid Emission Filter via Plasma Etching for Low-Invasive Fluorescence Detection. - Erus Rustami; Kiyotaka Sasagawa; Kenji Sugie; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2023)

Charge-Pump-Circuit Implementation for Increasing Sink Current in Low-Volage CMOS Retinal-Prosthesis Chips. - Wisaroot Sriitsaranusorn; Yuki Nakanishi; Takaya Hattori; Kuang-Chih Tso; Kenzo Shodo; Hironari Takehara; Yoshinori Sunaga; Makito Haruta; Hiroyuki Tashiro; Yasuo Terasawa; Jun Ohta; Kiyotaka Sasagawa (APCCAS, 2024)

Effects of Excitation Light Polarization with FrontLight Structure on Lensless Fluorescence Imaging. - Arphorn Promking; Kiyotaka Sasagawa; Yoshinori Sunaga; Yasumi Ohta; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (BioCAS, 2024)

Exposure Time Control Method for Higher Intermediate Frequency in Optical Heterodyne Imaging and Its Application to Electric-Field Imaging Based on Electro-Optic Effect. - Kiyotaka Sasagawa; Ryoma Okada; Yoshihiro Akamatsu; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta (Sensors, 2024)

Millimeter-Wave Band Electro-Optical Imaging System Using Polarization CMOS Image Sensor and Amplified Optical Local Oscillator Source. - Ryoma Okada; Maya Mizuno; Tomoaki Nagaoka; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (Sensors, 2024)

Microwave electro-optical imaging system using a frequency tracking optical local oscillator source with a polarization CMOS image sensor. - Ryoma Okada; Maya Mizuno; Hironari Takehara; Makito Haruta; Hiroyuki Tashiro; Jun Ohta; Kiyotaka Sasagawa (IEICE Electron. Express, 2025)