Opt⚙City ®-Quality Crystal & Optical Components
True zero-order waveplate is an ideal case of optical waveplate. True zero-order waveplates are so thin that the optical phase delay between the two polarizations is just 90° for quarter waveplate, and 180° for half waveplate. True zero-order waveplate is now widely used in laser Lab and optical instrument.
Multi-order waveplate, Zero order waveplate and True zero order waveplate are interchangeable for most of applications. For some critical applications, Zero order waveplate and True zero order waveplate should be considered. The advantages of zero-order waveplate are an increased bandwidth and a lower sensitivity to temperature changes.
However, the normal two plates design Zero order waveplate has a relatively larger thickness which reduces the field angle. For the applications where a large field angle is necessary, such as imaging systems, true zero order waveplate gives the solution. These true zero order waveplates are made of a very thin plate or cemented with a BK7 substrate, which ensures the best possible field angle, temperature and wavelength performance.
The following table gives the comparison of low order waveplate, zero order waveplate and true zero order waveplate(based on 1/2 @1064nm with 1/100 retardation variation):
|Type of Waveplate||Multi-Order||Zero Order||True Zero Order|
|Temperature Sensitivity (nm/°C)||0.05||0.006||0.006|
|Spectral Bandwidth (nm)||6.1||42.6||42.6|
|Acceptance Angle (deg.)||8||4||23|
Dimension Tolerance: +0.0/-0.1 mm
Parallelism <1 arc second
Surface Quality: 20-10
Wavefront Distortion: <λ/8 @ 633 nm
Retardation Tolerance: <λ/300
Coating: AR-coated R<0.2%
Damage Threshold: >500 MW/cm² 1 ns 1064 nm
Holder: Optional threaded mount
OptoCity offer the highest quality true zero-order quarter waveplates and half waveplates at very competitive price. Standard true zero-order waveplates are available in stock. OEM micro size waveplates, custom design including optical axis mark are available upon request.
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