BSL Deep-Sky Imaging – Relative Special Response

oooo


oooo

Relative Special Response (RSR)

oooo
oooo

Horizon ~ Wavelength (nm):
To measures how sensitive an image sensor is across different wavelengths of light relative to its highest sensitivity point.
o
o

Vertical ~ Peak Quantum Efficiency (High Peak QE):
It is a key specification for image sensors (CMOS/CCD) used in astrophotography and digital imaging.
o
o

Relative Special Response (RSR):
Wavelength tells you which light is hitting the sensor, QE tells you the exact efficiency of the conversion, and RSR shows you the shape of the senor’s sensitivity curve relative to its best-performing wavelength.

oooo


oooo
oooo
Quantum Efficiency (Peak QE):

oooo
What is a “best” percentage?
QE benchmarks vary depending on the device and application.
oooo

80% – 90%
Top-tier for modern back-illuminated CMOS astronomy sensors
60% – 80%
Good Sensitivity
40% – 60%
Average Sensitivity
10% – 40%
Low Sensitivity

More information:
QE = Peak Quantum Efficiency (Page 35)

oooo


oooo

Key Concepts & Formula

oooo

oooo


oooo

oooo

oooo

Back to

oooo

Back to page 35

Next to page 37

oooo


Page 36 – Relative Special Response
Derek Rowley – Derekscope’s BSL Guide to Deep-Sky Imaging
oooo


oooo

Comments are closed.