GAEA- Phase Only Spatial Light Modulators
The GAEA phase modulator models are
d on reflective
LCOS microdisplays with full 4K resolution (4094 x 2464
pixel) and small 3.74 μm pixel pitch. The GAEA phase
modulator series covers different versions optimized for
different applications and wavelength ranges.
Display Size
Resolution
Pixel Pitch
Fill Factor
Signal Format
Addressing Bit Depth
Input Frame Rate
0.7” (15.32 x 8.97 mm)
4094 x 2464 Pixel
3.74 μm
90 %
8 Bit
24 Hz (4094 x 2464 Pixel)
30 Hz (3840 x 2160 Pixel)
HDMI
Max. Spatial Resolution 133.5 lp/mm
Plug&Play and Flexible Calibration
The GAEA SLM is a plug & play phase modulator and can
be addressed with phase functions via standard graphics
cards as extended monitor device. The graphics card must
be able to provide an output at 4094 x 2464
pixel resolution. Addressing can be done using the supplied
“SLM Software” or standard image viewer software.
A certain gray level represents a defined average voltage
across the LC cell. This voltage leads to a variable tilt of the
LC molecules due to their electrical anisotropy. As LC
molecules also show optical anisotropy this tilt changes the
refractive index of the LC molecules (for incident polarization
along the long display axis) which causes a modified optical
path length within the LC cell and the addressed gray level is
converted into a phase level.
The GAEA driver unit is equipped with a USB interface that
allows changing the voltage vs. gray level distribution
(gamma control) and dynamic range
(voltage across the LC cell) in
order to calibrate the SLM
for different wavelengths.
High Spatial Resolution at 10 Megapixels
The GAEA Spatial Light Modulator offers a reflectivity of
~ 62% - 72% (@ 532 nm / 1550 nm).
Due to the optimized design of the
LCOS microdisplay the GAEA SLMs
show low cross talk between the
pixels resulting in high effective
spatial resolution at 133.5 lp/mm.
The small pixel pitch of 3.74 μm enables high diffraction
angles.
The phase displays can be addressed at full 4K resolution of
4094 x 2464 pixel at 24 Hz input rate and with slightly
reduced 3840 x 2160 pixel resolution at 30 Hz input rate.
HOLOEYE Photonics AG / Albert-Einstein-Str. 14 / 12489 Berlin / Germany
Phone +49 (0)30 63 92 36 60 / Fax +49 (0)30 63 92 36 62 /
The GAEA SLM offers diffraction efficiencies around 79 % in
the visible range and about 75 % at 1550 nm (e.g. for 16 level
blazed grating).
Different phase panel versions can be driven with the same
GAEA driver unit. Currently the
GAEA series covers a versions for
the visible (420 - 650 nm) and an
optimized version for typical
telecommunication wavelength in
the area of 1400 - 1700 nm (e.g.
C-Band 1550 nm). The model range
will be extended with at least a version for the wavelength
range 650 - 1064 nm soon.
