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Oriel Optical Shutter

Product catalog summary

Overview
The document provides detailed information about the Oriel Optical Shutter model 50075, which functions as an exposure control device and high-speed chopper. It is designed for use with visible light and requires a UV filter to prevent damage from UV radiation.

Specifications

Fast response time of less than 80 µs.
Vibration-free operation.
Compact design for easy mounting on Oriel 1.5 Inch Series instruments.
Open Shutter Transmittance: Greater than 25%.
Closed Shutter Transmittance: Less than 0.05%.
Contrast Ratio: Greater than 500:1.
Wavelength Range: 400 - 700 nm, centered at 510 ±25 nm.
Operating Temperature: 0 to 50 °C.
Drive Mechanism: ±5 V DC bipolar waveform.

Principle of Operation
The shutter uses a ferroelectric liquid crystal (FLC) cell sandwiched between two polarizers. Applying +5 VDC rotates the FLC layer's optical axis, allowing light to pass through. Applying -5 VDC aligns the FLC with the input polarizer, blocking the light.

Ordering Information

Model 50075: Optical Shutter.
Model 51292: UV Long Pass Filter.
Model 7123: Filter Holder.

For more information, refer to the manufacturer's website.

Catalog excerpts

1320 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 S p e c t r o s c o p y I n s t r u m e n t s MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS ACCESSORIES FOR FT-IR SPECTROMETERS SPECTROSCOPY INSTRUMENTS Oriel Optical Shutter 50075 Optical Shutter The 50075 isn’t just a shutter – it also serves as an exposure control device and a high speed chopper. This bi-stable system changes state when the polarity of the 5 VDC driving voltage is changed (it has an undetermined state when not energized); response time is an impressive <80 ìs. The 50075 mounts directly to Oriel 1.5 Inch Series female flanged instruments. A 6.5 ft. (2 m) BNC lead connects the shutter to your square wave generator. It is for visible light only. Filter UV radiation, as it can permanently damage the FLC material, with the 51292 UV Long Pass Filter. Principle of Operation POLARIZER FLC CELL ANALYZER CLOSED OPEN • Fast response time, <80 ìs • Vibration free • Compact and easily mounted Specifications (Room Temperature) Open Shutter Transmittance >25% Closed Shutter Transmittance <0.05% Contrast Ratio >500:1 Optical Delay Time (0-10%) <80 ìs Rise/Fall Time (10-90%/90-10%) <80 ìs Transmitted Image Quality >75 pl/mm Transmitted Wavefront Distortion <0,5 onde (w/o polarizers, ë = 632.8 mm) Wavelength Range 400 - 700 nm (center ë = 510 ±25 nm)* Acceptance Cone, 2a 20º, maximum (0.34 NA or F/1.4) Operating Temperature 0 to 50 °C** Drive Mechanism ±5 V DC bipolar waveform Switching Energy (300 ìW @ 60 Hz) <2,5 ìJ (300 ìW @ 60 Hz) Capacitance <200 nF Typical Series Resistance ~200 Ù Shunt Resistance >20 MÙ * Use the 51292 Filter to block UV radiation. ** Performance specifications vary with temperature. Ordering Information Model Description 50075 Optical Shutter 51292 UV Long Pass Filter 7123 Filter Holder See our website WEBfor more info The design of our optical shutter is simple. A thin layer of FLC (ferroelectric liquid crystal) material is sandwiched between two polarizers. When +5 VDC is applied, the optical axis of the FLC layer, ë/2 thick at 510 nm, rotates ~45° with respect to the first polarizer. After passing through the FLC layer, the orientation of the polarization axis of the transmitted light rotates ~90°, allowing transmittance through the second polarizer. Fig. 1 illustrates the principle. When -5 VDC is applied to the shutter, the optic axis of the FLC is aligned with the input polarizer, producing no polarization rotation. The second, crossed polarizer blocks the light, closing the shutter. Fig. 1 Principle of operation of 50075 Optical Shutter.

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