X10468_15 Datasheet, PDF (5/9 Pages) Hamamatsu Corporation – LCOS-SLM (Liquid Crystal on Silicon - Spatial Light Modulator)

LCOS-SLM (Liquid Crystal on Silicon - Spatial Light Modulator)
X10468/X13267/X13138 series
Diffraction efficiency
The X10468/X13267/X13138 series is a pure phase SLM with high precision phase control; therefore, it has high diffraction efficiency close to
the theoretical values. Figure 3 shows images of diffracted spots, when a multi-level phase grating is formed in the X10468 series and Figure 4
shows typical diffraction efficiency characteristics. Here, the diffraction efficiency is defined I1/I0, I1 is intensity of the 1st order diffraction spot,
I0 is the intensity of the 0th order light when no pattern is displayed.
[Figure 3] Diffracted spots images (typical example)
0^th
(a) No pattern
+1^st
-1^st
(b) 2-level grating (25 lp/mm)
+1^st
(c) 4-level grating (12.5 lp/mm)
[Figure 4] Diffraction efficiency (typical example)
(Ta=25 °C)
100
90
80
70
60
50
X10468-01
40
X10468-02
X10468-03
30
X10468-04
Theoretical
20
X10488-05
X10468-06
10
X10468-07
X10468-08
0
0
5
10
15
20
25
30
Spatial frequency (lp/mm)
KACCB0272EA
5