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Meadowlark Optics’ Liquid Crystal on Silicon (LCoS) Spatial Light Modulators (SLMs) are uniquely designed for pure phase applications and incorporate analog data addressing with high refresh rates. This combination provides users with the fastest response times with high phase stability. The 1024 x 1024 SLM is good for applications requiring high speed, high diffraction efficiency, low phase ripple, and high-power lasers.
High Speed with High Phase Stability – Great care was taken in the design of the 1024 x 1024 silicon backplane to enable high-speed operation while simultaneously maximizing phase stability. Engineers successfully achieved high speed without compromising phase stability.
The 1024 x 1024 SLM is incredibly fast with liquid crystal response times ranging from 0.6 to 8 ms (wavelength dependent) for a full wave of modulation. In our ultra-high-speed model customers can control the temperature set point to find the perfect balance between switching speed and phase stability.
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Meadowlark Optics specializes in precision polymer retarders for the visible to near infrared region. Our Precision Retarders have the highest optical quality and tightest retardance tolerance of all polymer retarders. These true zero-order Precision Retarders consist of a birefringent polymer cemented between two precision polished, optically flat BK 7 windows. The retarder fast axis is conveniently marked for quick and easy reference.
Precision Retarders are supplied with a broadband antireflection coating. Optical transmittance of a Precision Retarder is typically greater than 97%. The retardance at a wavelength λ that is different from the center wavelength λc is given by: δ ˜ δc(λc /λ) where δc is the retardance at λc.
This relationship is very important when using sources which vary in wavelength from their nominal value. The 2 graphs show the retardance behavior as a function of relative wavelength for a quarter- and half-wave retarder, respectively. The Mueller calculus can be used to calculate the transmitted polarization state based upon the retardance differences from the ideal case.
Since polymer retarders are true zero-order devices, they offer the significant advantage of improved angular performance. You can expect less than 1% retardance change over ±10° incidence angle.
Meadowlark Optics has developed precision ellipsometric techniques that can measure retardance to λ/1000.Our metrology for these measurements is the best in the industry. You can have absolute confidence that the calibration measurements supplied with your retarder are of the highest accuracy obtainable.
