Quantum efficiency characterization of LBNL CCD's: Part I. The quantum efficiency machine

Donald E. Groom; Christopher J. Bebek; Maximilian Fabricius; Armin Karcher; William F. Kolbe; Natalie A. Roe; Jens Steckert

doi:10.1117/12.667313

6 February 2006 Quantum efficiency characterization of LBNL CCD's: Part I. The quantum efficiency machine

Donald E. Groom, Christopher J. Bebek, Maximilian Fabricius, Armin Karcher, William F. Kolbe, Natalie A. Roe, Jens Steckert

Author Affiliations +

Proceedings Volume 6068, Sensors, Cameras, and Systems for Scientific/Industrial Applications VII; 60680F (2006) https://doi.org/10.1117/12.667313
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

Instrumentation was developed in 2004 and 2005 to measure the quantum efficiency of the Lawrence Berkeley National Lab (LBNL) total-depletion CCD's, intended for astronomy and space applications. This paper describes the basic instrument. Although it is conventional even to the parts list, there are important innovations. A xenon arc light source was chosen for its high blue/UV and low red/IR output as compared with a tungsten light. Intensity stabilization has been difficult, but since only flux ratios matter this is not critical. Between the light source and an Oriel MS257 monochromator are a shutter and two filter wheels. High-bandpass and low-bandpass filter pairs isolate the 150-nm wide bands appropriate to the wavelength, thus minimizing scattered light and providing order blocking. Light from the auxiliary port enters a 20-inch optical sphere, and the 4-inch output port is at right angles to the input port. An 80 cm drift space produces near-uniform illumination on the CCD. Next to the cold CCD inside the horizontal dewar is a calibrated reference photodiode which is regulated to the PD calibration temperature, 25° C. The ratio of the CCD and in-dewar reference PD signals provides the QE measurement. Additional cross-calibration to a PD on the integrating sphere permits lower-intensity exposures.

Citation Download Citation

Donald E. Groom, Christopher J. Bebek, Maximilian Fabricius, Armin Karcher, William F. Kolbe, Natalie A. Roe, and Jens Steckert "Quantum efficiency characterization of LBNL CCD's: Part I. The quantum efficiency machine", Proc. SPIE 6068, Sensors, Cameras, and Systems for Scientific/Industrial Applications VII, 60680F (6 February 2006); https://doi.org/10.1117/12.667313

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available