Quantum Efficiency Calibration of CCD on UV Band Qian Song, Zhiwei Feng, Yangbing Liu

Chinese National Astronomical Observatories

Setup of the UV calibration system

Lamp

CCD Camera

D

M2M1

M3

Collimator

Integrating-Sphere

Monochromator

Pinhole image on 245nm0 10000 20000 30000 40000 50000 60000 70000

0

10000

20000

30000

40000

50000

60000

Var

ian

ce/A

DU

Signal/ADU

Photon Transfer Curve gain4 @Gain Setting:4 Readout:Left

200 250 300 350 400

0.00E+000

1.00E-010

2.00E-010

3.00E-010

4.00E-010

5.00E-010

6.00E-010

P1 P2 P3 D

Cur

rent

of

D (

A)

Wavelength (nm)

stability of the light source

200 250 300 350 400

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

QE1 QE2 QE3

QE

Wavelength (nm)

Three tests of QE with an E2V 42-70 UV enhanced CCD.