Home All Products Optical Components Optical Lenses Dual-Wavelength Focusing Lenses DW-202-AP-Y-A
Dual-Wavelength Focusing Lenses DW-202-AP-Y-A
Optical Lenses

Dual-Wavelength Focusing Lenses DW-202-AP-Y-A

Supplier
Sinteclaser
Part Number
DW-202-AP-Y-A
Category
Optical Lenses
Origin
China

A dual-wavelength focusing lens is a diffractive optical element that focuses two incident wavelengths to the same focus, supporting applications that use two laser wavelengths simultaneously. Examples include CO2 and He-Ne lasers, and CO2/He-Ne laser diffractive elements. The dual-wavelength focusing lens combines the CO2 laser focus and the visible beam focus at one point while correcting chromatic aberration between the CO2 laser and its visible beam. During selection and customization, focal lengths for both wavelengths are determined according to the customer's application. We also offer diffractive F-Theta lenses with dual-wavelength focusing lenses for medical inspection and scanning systems. These provide focal offset and field correction without placing the dual-wavelength focusing lens inside the scanner, offering practical convenience. Their model designations use FT, such as FT-001-AP-Y-A in the model table. Laser systems using multiple wavelengths simultaneously have chromatic aberration. Shorter wavelengths focus at shorter distances than longer wavelengths. A simple example of chromatic aberration for dual-wavelength incident beams is shown below. A DOE corrects chromatic aberration between widely separated wavelengths so that both operating wavelengths have the same focal length. The diffractive pattern generally affects only the shorter wavelength, extending its focal point to the focal position of the longer wavelength. Model catalog: Model | Wavelength[nm] | Incident spot[mm] | Working distance[mm] | Element diameter[mm] | Material | Coating DW-201-AP-Y-A | 10600, 633 | 4-8.8 | 123.7 | 15 | ZnSe | V antireflection coating DW-202-AP-Y-A | 10600, 633 | 4-12 | 20 | 19 | ZnSe | V antireflection coating DW-208-AP-Y-A | 10600, 633 | 4-13.3 | 100 | 38.1 | ZnSe | V antireflection coating FT-001-AP-Y-A | 10600, 633 | 4-13 | 31.67 | 25.4 | ZnSe | V antireflection coating

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Overview

A dual-wavelength focusing lens is a diffractive optical element that focuses two incident wavelengths to the same focus, supporting applications that use two laser wavelengths simultaneously. Examples include CO2 and He-Ne lasers, and CO2/He-Ne laser diffractive elements. The dual-wavelength focusing lens combines the CO2 laser focus and the visible beam focus at one point while correcting chromatic aberration between the CO2 laser and its visible beam. During selection and customization, focal lengths for both wavelengths are determined according to the customer's application. We also offer diffractive F-Theta lenses with dual-wavelength focusing lenses for medical inspection and scanning systems. These provide focal offset and field correction without placing the dual-wavelength focusing lens inside the scanner, offering practical convenience. Their model designations use FT, such as FT-001-AP-Y-A in the model table. Laser systems using multiple wavelengths simultaneously have chromatic aberration. Shorter wavelengths focus at shorter distances than longer wavelengths. A simple example of chromatic aberration for dual-wavelength incident beams is shown below. A DOE corrects chromatic aberration between widely separated wavelengths so that both operating wavelengths have the same focal length. The diffractive pattern generally affects only the shorter wavelength, extending its focal point to the focal position of the longer wavelength. Model catalog: Model | Wavelength[nm] | Incident spot[mm] | Working distance[mm] | Element diameter[mm] | Material | Coating DW-201-AP-Y-A | 10600, 633 | 4-8.8 | 123.7 | 15 | ZnSe | V antireflection coating DW-202-AP-Y-A | 10600, 633 | 4-12 | 20 | 19 | ZnSe | V antireflection coating DW-208-AP-Y-A | 10600, 633 | 4-13.3 | 100 | 38.1 | ZnSe | V antireflection coating FT-001-AP-Y-A | 10600, 633 | 4-13 | 31.67 | 25.4 | ZnSe | V antireflection coating

Applications

The operating principle is simple. For a collimated dual-wavelength input beam, single-mode or multimode, the two output beams are focused at one fixed focal length. The focal length is predetermined during DOE design and is based on the longer-wavelength focal length. This configuration is mainly used for chromatic correction after combining a high-power infrared laser beam, usually a CO2 laser beam, with a visible aiming beam. For chromatic correction of two or more closely spaced wavelengths, the diffractive pattern affects all operating wavelengths; a specially designed diffractive pattern brings all wavelengths to the same focus. For controlling chromatic aberration among two or more closely spaced wavelengths, each wavelength focal length can be changed as required to achieve a fixed separation, as shown in the figure below. Biomedical and surgical laser systems; industrial CO2 laser systems.

Key Features

High efficiency and high diffraction efficiency; small size and compact structure; high energy threshold/high damage threshold for high-power lasers; pure ZnSe material; optional antireflection coating

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Supplier Information

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Sinteclaser
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Wuhan Sintec Optoelectronics Technology Co., Ltd. is a high-tech enterprise and a specialized and sophisticated 'Little Giant' enterprise at the upstream of the domestic laser industry chain. The company focuses on the R&D, manufacturing, sales and service of lasers and laser accessories. Its main products include femtosecond lasers, picosecond lasers, acousto-optic modulators, optical components, etc., widely used in laser equipment manufacturing, scientific research and other fields. Located in Wuhan Optical Valley, with a modern industrial park, the company provides one-stop personalized services for the laser industry, with customers all over China and products exported overseas.

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