偏振片Introduction：
Achromatic waveplate is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material waveplates the working wavelength is very limited because of the dispersion of the material. While Achromatic Waveplate use two different kinds of material, the dispersions of the birefringence are also different. Hence such waveplate is not sensitive to the wavelength change. GATHERLIGHT design Achromatic Zero-Order Quartz-MgF2 waveplates with working wavelength range larger than 300nm and retardation better than l/50 for l/2 waveplate and better than l/100 for l/4 waveplate.
Main advantages：
Extremely broad wavelength ranges
High damage threshold for Air-spaced Achromatic waveplate
Low sensitivity within the designed wavelength
Retardation tolerance up to ±l/100 over the wavelength range
Main applications：
Laser systems
Spectrophotometry
Optical communication devices
DVD, CD, Polarization digital cameras
Main properties：
Material: Crystal Quartz and MgF2
Dimension Tolerance: +0.0, -0.2 mm
Wavefront Distortion: λ/4 @ 632.8 nm
Retardation Tolerance: better than λ/50 for λ/2 achromatic waveplate
better than λ/100 for λ/4 achromatic waveplate
Wavelength Range: standard wavelength
Parallelism: up to 10 arc second
Surface Quality: 20-10 scratch and dig
Standard Wavelength Ranges
VIS: 460nm—620nm
NIR: 700nm--1000nm
IR: 1200nm—1650nm
Retardation at 532nm = 184.951° (order = 0)
Wide Wavelength Range
Large Field Angle
High Extinction Ratio
Guarantee a wide transmission range,especially,suitable for UV applications
Solit the ordinary and extrordinary ray,but only extraordinary beam is deviated.
Wide Wavelength Range
Both ordinary and extraordinary beams are deviated.
Suitable for low power application and where the large deviations is required.
Large Acceptance Angle:Special design for the ratio of L/A(length/aperture)guarantees the wide acceptance angle
High Polarization Purity
Suitable for low power applications
High Polarization Purity
Wide Wavelength Range
High UV Transmission
Available with two,one or no escape ports for extra power capacity
Suitable for high power applications.
◇ Material: Crystal Quartz
◇ Dimension Tolerance: +0.0,-0.1mm
◇ Wavefront Distortion: <λ/8@632.8 nm
◇ Wavelength Range: 440-1600nm
◇ Retardation Accuracy: <5 arc minutes
◇ Surface Quality: 20/10 scratches & dig
◇ Clear Aperture: >90%
◇ AR Coating: R<0.2% at central wavelength
◇ Rotation Orientation: Clockwise (right-handed,standard)
Excellent optical performance
All kinds of coatings are available.
Custom designs for other sizes and coatings are also available upon request.
* Standard Wavelength:
532nm,632.8nm,and 1064nm
Order information: Part No.-Dimension-Wavelength-Coating
For example: φ12.7,45deg rotator,632.8nm,AR coated,Polarization rotator
CPR-127-45° -632.8-AR
◇ Wavelength Range: 200-400nm(UV grade fused silica) 400-2000nm(BK7 glass)
◇ Dimension Tolerance: ±0.1mm
◇ Surface quality: 20/10 scratch & dig
◇ Surface flatness: λ/10 @ 633nm
◇ Retardation tolerance: ±2°
◇ Protective Bevel
◇ Material and finished: Black anodized aluminum
◇ Outside Diameter(D) Tolerance: ±0.1mm
◇ Thickness(t) Tolerance: ±0.1mm
◇ Waveplate Diameter(f) Tolerance: +0.15,-0.0mm
◇ Rotating Holder:
Material and finished: Black anodized aluminum
Rotation Accuracy: <1°
Dimension) Tolerance: ±0.1mm
Custom designs for other sizes mounted are also available.
Dual wavelength waveplate is widely used on Third Harmonic Generation (THG) system.
When you need a NLO crystal for type II SHG (o+e→e), and a NLO crystal for type II
THG (o+e→e), the out put polarization from SHG can not be used for THG. So you must
turn the polarization to get two perpendicular polarization for type II THG. Dual wavelength
waveplate works like a polarizing rotator, it can rotate the polarization of one beam
and remain another beam’s polarization. Also the dual wavelength waveplate can be applied
to following systems:
1. Type II SHG + Type II THG
2. Type II SHG + Type I THG
3. Type I SHG + Type I THG
◇ For example: we use KTP as SHG type II and LBO as THG type II, but the polarization of output beam from KTP is not optimized for THG type II. When we use a dual wavelength waveplate as drawing, it can change the 532nm beam to a special angle polarization but not change 1064nm beam at all.
Specifications:
Material: Crystal Quartz
Diameter Tolerance: +0.0,-0.2mm
Wavefront Distortion: <λ/8@633 nm
Retardation Tolerance: <λ/100
Parallelism: <3"
Surface Quality: 20/10 Scratch and dig
Dual Wavelength AR Coating: R<0.2% at fundamental wavelength; R<0.5% at SHG wavelength
Material: Crystal Quartz
◇ Diameter Tolerance: +0.0,-0.2mm
◇ Retardation Tolerance: <λ/300
◇ Wavelength Range: 1000-2100 nm
◇ Surface Quality: 40/20 scratch & dig
◇ Wavefront Tolerance: λ/8@633
◇ Parallelism: ≤3"
◇ Coating: R<0.2% on both surface at central wavelength
High Damage Threshold.
Wide Temperature Bandwidth.
Wide Angle Acceptance
GATHERLIGHT’s standard coatings are available .
Custom designs for other sizes and coatings are also available upon request.
◇ Material: Crystal Quartz & BK7 glass
◇ Diameter Tolerance: +0.0,-0.2mm
◇ Retardation Tolerance: <λ/300
◇ Wavelength Range: 400-2100 nm
◇ Surface Quality: 20/10 scratch & dig
◇ Wavefront Tolerance: λ/8@633
◇ Parallelism: ≤3"
◇ Coating: R<0.2% on both surface at central wavelength
Wide angle Acceptance
Wide Temperature Bandwidth.
Broad spectral Bandwidth.
GATHERLIGHT’s standard coatings are available .
Custom designs for other sizes and coatings are also available upon request.
◇ Diameter Tolerance: +0.0,-0.2mm
◇ Retardation Tolerance: <λ/300
◇ Wavelength Range: 240-2100 nm
◇ Surface Quality: 40/20 scratch & dig
◇ Wavefront Tolerance: λ/8 @ 633nm
◇ Parallelism: ≤3"
◇ Coating: R<0.2% on both surface at central wavelength
High Damage Threshold.
Wide Temperature Bandwidth.
Broad spectral Bandwidth.
GATHERLIGHT’s standard coatings are available .
Custom designs for other sizes and coatings are also available upon request.
◇ Material: Crystal Quartz
◇ Thickness: 0.2-0.5 mm
◇ Diameter Tolerance: +0.0,-0.2mm
◇ Reātardation Tolerance: <λ/300
◇ Wavelength Range: 240-2100 nm
◇ Surface Quality: 20/10 scratch & dig
◇ Wavefront Tolerance: λ/8@633
◇ Parallelism: ≤3"
◇ Coating: R<0.2% on both surface at central wavelength
High Damage Threshold.
Better Temperature Bandwidth.
Wide Temperature Bandwidth.
.Custom designs for other sizes and coatings are also available upon request.
High Polarization Purity
Wide Wavelength Range
High Total Transmission