Waveplate-Optical parts-Beijing Honour Optics Co., Ltd-Honour Optics Co., Ltd

Waveplate

Waveplates (retarders) are made from birefringent materials which introduce a phase difference between the fast and slow principal axis of the waveplate.The optical axis of waveplate is parallel to the face.Light incident normal to the surface will be split to components polarized parallel and perpendicular to the optical axis with different refractive index and velocity in this device.The difference in velocities gives rise to a phase shift which is called retardance.At any specific wavelength the phase retardance is governed by the thickness of Waveplates. The standard waveplates we provided include half waveplates and quarter waveplates,other custom waveplates can also be provided upon request.

Standard Specifications
Material	Crystal Quartz
Typical Dimension φ(mm)	Customized
Dimension Tolerance	+0.0/-0.1mm
Wavefront Distortion	λ/10 @632.8nm
Retardation Tolerance	λ/300
Parallelism	<1 arc second
Surface Quality	20/10 scratch and dig
Axis Orientation Tolerance	0.1°
Clear Aperture	>90%central area
AR Coating	R<0.25%@ central wavelength
Standard Wave	Quarter-wave (3λ/4), Half-wave (λ/2)

True Zero Order Waveplates

Features
● Epoxy Cemented
● High Damage Threshold
● Better Temperature Bandwidth
●Wide Wavelength Bandwidth

This type of true zero order waveplate is constructed of a waveplate and a BK7 substrate. As the quartz plate is very thin and easy to be damaged, the BK7 plate's function is to strengthen the waveplate.

Zero Order Waveplates

Features
● Optically Contacted or Epoxy Cemented
● High Damage Threshold
● Better Temperature Bandwidth
● Wide Wavelength Bandwidth

Low Order Waveplates

Features
● High Damage Threshold
● Wide Wavelength Bandwidth
● Low Cost

Multi Order Waveplates

Key Features
● Thickness: 0.3-0.5mm
●Wide Wavelength Bandwidth
● Better Temperature Bandwidth
● Low Cost

Dual Wavelength Waveplates

The waveplates is a kind of multiple waveplates which can provide specific retardance at two different wavelengths. It's very useful to manage the states of polarization of laser beams to obtain maximum conversion efficiency.

Key Features
● Thickness: <1.5mm
● Optional Wavelength
● Main Application:
Type II (SHG) + Type II (THG)
Type I (SHG) + Type I (THG)
Type II (SHG) + Type I (THG)

Achromatic Waveplates

Achromatic waveplates is similar to zero order waveplates except that the two plates are made from different birefringent crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.

Key Features

● Epoxy Cemented or Air Spaced available
● Broad Bandwidth