X10468_15 Datasheet, PDF (6/9 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
Phase fluctuation
As the LCOS-SLM is driven by AC power, the output light will fluctuate according to the drive frequency even when a uniform pattern is displayed
over the entire surface. Figure 5 shows an example of the phase fluctuation for the -04 types. The drive frequency is 120 Hz for SXGA operation
(X13138-04) and 240 Hz for SVGA operation (X10468/X13267-04). In SXGA operation, which operates at low frequency, the phase fluctuation
is about four times greater than that in SVGA operation.
[Figure 5] Phase fluctuation (typical example)
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
0
SVGA operation
SXGA operation
10 20 30 40 50 60 70 80 90 100
Time (ms)
KACCB0386EA
Output image examples
The X10468/X13267/X13138 series has high precision phase control and high diffraction efficiency, and is very suitable for holographic applica-
tions. Figure 6 (a) is a interferometer picture of the output wavefront with a flatness calibration. The image in Figure 6 (b) was reconstructed as
the 1st diffraction order of the phase hologram through the Fourier transform optics. Figure 6 (c) shows a clear Laguerre Gaussian (LG) beam
of (0, 1) order.
[Figure 6] Output image examples
(a) Interferogram of output
wavefront with calibration
800 × 600 pixels
RMS: 0.025 λ (λ=532 nm)
(b) Reconstructed image of CGH
(c) LG beam
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