LCOS-SLM characteristics

Phase fluctuations

LCOS-SLM has phase fluctuations corresponding to the 120 Hz driving cycle of the liquid crystal. The higher the liquid crystal drive voltage, the larger the phase fluctuations. This means that lowering the liquid crystal drive voltage can reduce the phase fluctuations but the response speed of the liquid crystal will slow down. In this way, there is a trade-off between the response speed and phase fluctuations. The liquid crystal drive voltage for our LCOS-SLM can be set to a low voltage as needed from a PC connected via USB. Typical examples of the response speed and phase fluctuations are shown in the table below.

Drive voltage vs. response speed and phase fluctuations (typical examples)

Type No.

Specific wavelength type 

-02

-03B

-16

Drive voltage

Standard voltage

Low voltage

Standard voltage

Low voltage

Standard voltage

Low voltage

Response time

Rise time (ms)

28.8

83.0

24.0

126.0

11.6

54.0

Fall time (ms)

75.0

134.0

79.0

256.0

37.0

110.0

Phase fluctuations

Peak to peak (π rad.)

0.0031

0.0023

0.0043

0.0013

0.0029

0.0017

RMS 
(π rad.)

0.0008

0.0007

0.0013

0.0003

0.0008

0.0004

※For more details on specifications of other types, please contact us.

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