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Product Description

Design wavelength: 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm optional
Phase retardation δ = π
Commonly used for rotating the polarization direction of the linearly polarized light

The LBTEK Achromatic Half-Wave Plates is composed of a quartz waveplate and an MgF2 waveplate with a spacer sandwiched in between, and the fast axes of the two waveplates are perpendicular to each other. When a beam of linearly polarized light is incident perpendicularly on the waveplate, it decomposes into o-light and e-light, which propagate along the original direction but vibrate in mutually perpendicular directions, with corresponding refractive indices of no and ne. Due to the different velocities of the two types of light in the crystal, the phase retardation produced after passing through a waveplate with a thickness of d is δ=(2π/λ)|no-ne|d. Here, |no-ne|d is the optical path difference, and the optical path difference produced by a half-wave plate is (2m+1)λ/2, with a phase retardation of δ = (2m+1)π, where m is a non-negative integer. The phase retardation of the achromatic half-wave plate is the combined result of the quartz waveplate and the MgF2 waveplate. By designing the thicknesses of the two waveplates, the achromatic half-wave plate produces a phase retardation of π, and the fast axis direction is determined by the waveplate that contributes the larger phase retardation. The LBTEK Achromatic Half-Wave Plate is commonly used to rotate the polarization direction of the linearly polarized light. Compared with other LBTEK Half-Wave Plates, the achromatic waveplate is less sensitive to wavelength, with design wavelength ranges of 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm available. Additionally, the achromatic waveplates sold by LBTEK come pre-installed in mechanical housings, which are non-detachable for easy use. Besides the standard achromatic half-wave plates, LBTEK also offers various customization services, including special sizes, design wavelengths, phase retardation specifications, and more. For specific customization needs, please contact LBTEK Technical Support.

Attribute

Design wavelength400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm optional

Optical component materialQuartz crystal & MgF2

Mechanical housing diameter25.4 mm

Mechanical housing diameter tolerance+0.0/-0.1 mm

Latencyλ/2

Clear Aperture10.0 mm

CoatingRavg<0.5% @Design Wavelength (6° angle of incidence, single surface)

λ/8 @632.8 nm

Surface Parallelism<10 arcsec

Surface finish (scratches/pits)40/20 (Quartz), 80/50 (Magnesium Fluoride)

Achromatic Half-Wave Plates, Clear Aperture Ø10.0 mm, with a Retaining Ring for Mounting

Design wavelength: 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm optional
Diameter: Ø25.4 mm
Clear aperture: Ø10 mm
Mounted with mechanical housings

The LBTEK Achromatic Half-Wave Plate is commonly used to rotate the polarization direction of the linearly polarized light without altering its intensity. When the linearly polarized light passes through the achromatic half-wave plate, it produces an optical path difference of λ/2 and a phase delay of π. The mounted achromatic half-wave plate features a non-detachable mechanical housing, with the product model and fast-axis indicator line engraved on the housing surface for easy identification and use by customers.

The LBTEK Achromatic Half-Wave Plate is often installed in a rotation mount

Product Model	Operating Wavelength	Clear Aperture	Unit Price	Lead Time
AHWP10-LNIR	1100 nm-1650 nm	10.0 mm	$713.06	6 weeks
AHWP10-SNIR	700 nm-1100 nm	10.0 mm	$713.06	6 weeks
AHWP10-VIS	400 nm-700 nm	10.0 mm	$713.06	6 weeks

Achromatic Half-Wave Plates, Clear Aperture Ø20.0 mm, with a Retaining Ring for Mounting

Design wavelength: 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm optional
Diameter: Ø25.4 mm
Clear aperture: Ø20.0 mm
Mounted with mechanical housings

The LBTEK Achromatic Half-Wave Plate is often installed in a rotation mount

Product Model	Operating Wavelength	Clear Aperture	Unit Price	Lead Time
AHWP20-LNIR	1100 nm-1650 nm	20.0 mm	$905.51	6 weeks
AHWP20-SNIR	700 nm-1100 nm	20.0 mm	$896.88	6 weeks
AHWP20-VIS	400 nm-700 nm	20.0 mm	$896.88	6 weeks

Achromatic Half-Wave Plates, Clear Aperture Ø20.0 mm, Mounted in SM1 Standard Lens Tubes

Design wavelength: 400 nm-700 nm, 700 nm-1100 nm, and 1100 nm-1650 nm optional
Clear aperture: Ø20 mm
Mounted in SM1 standard lens tubes

The LBTEK Achromatic Half-Wave Plate is commonly used to rotate the polarization direction of the linearly polarized light without altering its intensity. When the linearly polarized light passes through the achromatic half-wave plate, it produces an optical path difference of λ/2 and a phase delay of π. The achromatic waveplate mounted in an SM1 standard lens tube is installed inside the lens tube based on the retaining ring mount. The SM1 thread allows for various types of adapters, and the tube is non-detachable. The tube surface is engraved with the product model and the fast-axis indicator line of the waveplate for easy identification and use by customers.

The achromatic waveplate with a SM1 lens tube is directly installed on a rotation mount.

Product Model	Operating Wavelength	Clear Aperture	Unit Price	Lead Time
MAHWP20-LNIR	1100 nm-1650 nm	20.0 mm	$913.62	7 weeks
MAHWP20-SNIR	700 nm-1100 nm	20.0 mm	$905.12	7 weeks
MAHWP20-VIS	400 nm-700 nm	20.0 mm	$905.12	7 weeks