A novel digital image sensor with row wise gain compensation for Hyper Spectral Imager (HySI) application

Shengmin Lin; Chi-Pin Lin; Weng-Lyang Wang; Feng-Ke Hsiao; Robert Sikora

doi:10.1117/12.826505

12 August 2009 A novel digital image sensor with row wise gain compensation for Hyper Spectral Imager (HySI) application

Shengmin Lin, Chi-Pin Lin, Weng-Lyang Wang, Feng-Ke Hsiao, Robert Sikora

Author Affiliations +

Proceedings Volume 7458, Remote Sensing System Engineering II; 745805 (2009) https://doi.org/10.1117/12.826505
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

A 256x512 element digital image sensor has been developed which has a large pixel size, slow scan and low power consumption for Hyper Spectral Imager (HySI) applications. The device is a mixed mode, silicon on chip (SOC) IC. It combines analog circuitry, digital circuitry and optical sensor circuitry into a single chip. This chip integrates a 256x512 active pixel sensor array, a programming gain amplifier (PGA) for row wise gain setting, I²C interface, SRAM, 12 bit analog to digital convertor (ADC), voltage regulator, low voltage differential signal (LVDS) and timing generator. The device can be used for 256 pixels of spatial resolution and 512 bands of spectral resolution ranged from 400 nm to 950 nm in wavelength. In row wise gain readout mode, one can set a different gain on each row of the photo detector by storing the gain setting data on the SRAM thru the I²C interface. This unique row wise gain setting can be used to compensate the silicon spectral response non-uniformity problem. Due to this unique function, the device is suitable for hyper-spectral imager applications. The HySI camera located on-board the Chandrayaan-1 satellite, was successfully launched to the moon on Oct. 22, 2008. The device is currently mapping the moon and sending back excellent images of the moon surface. The device design and the moon image data will be presented in the paper.

Citation Download Citation

Shengmin Lin, Chi-Pin Lin, Weng-Lyang Wang, Feng-Ke Hsiao, and Robert Sikora "A novel digital image sensor with row wise gain compensation for Hyper Spectral Imager (HySI) application", Proc. SPIE 7458, Remote Sensing System Engineering II, 745805 (12 August 2009); https://doi.org/10.1117/12.826505

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KEYWORDS

Image sensors

Cameras

Imaging systems

Analog electronics

Sensors

Digital electronics

Optical amplifiers

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