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These YAG lenses range in focal length from 20 to 150mm. They consist of either two or three air-spaced glass elements mounted in a metal cell. The lenses all have a 30mm clear aperture but they are recommended for use with beams not exceeding one inch in diameter. Two different designs are used - the 20, 30, 40, and 50mm focal length lenses have three elements, but the 60, 80, 100, and 150mm lenses use simpler two element designs. These lenses are Anti-Reflection coated with a high damage Narrowband Multilayer Anti-Reflection coating optimized to give less than 0.5% reflectance per surface at 1064nm.
These lenses are chromatically corrected so that a HeNe guide beam or a visible range video monitor beam will be in focus at the same position as the YAG beam.
Spot size or beam waist is inversely proportional to the numerical aperture at the effective beam diameter. The spot size given in the table is for a full aperture beam. Let us know your imaging requirements and we will be pleased to advise you on the appropriate lens for your application.
Since these lenses are often used with high power lasers we offer optional protective windows which can be attached to the focusing side of the lens. In the event of inadvertent back reflection of high energy beams into the lens it is likely that the window will absorb the incident energy and shatter preventing further damage to the lens itself. Protective windows are offered uncoated in packages of ten pieces. For optimum performance we advise that the protective windows be Anti-Reflection coated with our A46 V Coat at 1064nm.
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The Laser Mech Lens Mounting System solves the problem of lens removal for replacement and inspection. By using a simple cartridge mounted lens inserted into a side slot in a permanently positioned manifold block, the problems of the traditional threaded, axially inserted lenses are avoided. This innovative mounting method allows removal and replacement of the lens in seconds with no readjustment of the optical alignment and without the removal, replacement or disassembly of any other part of the optical system.
Each assembly consists of a lens mount manifold block with very fine, adjustable lens centering screws and a spring-loaded, lens holder assembly to hold the lens. The lens holder contains all the seals necessary to pressurize the space beneath the lens for use with the Gas Jet Manifold.
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Line generator can be used to display a uniform straight reference line for use in alignment, machine vision systems, construction and process control.In addition, the lenses may also be used on lower power lasers, lenses are available in fan angles of 7°, 10°, 30°, 45°, 60°, 75° and 90° for custom applications.
80-240VAC, RoHS, FDA, CE complied
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Line generator can be used to display a uniform straight reference line for use in alignment, machine vision systems, construction and process control.In addition, the lenses may also be used on lower power lasers, lenses are available in fan angles of 7°, 10°, 30°, 45°, 60°, 75° and 90° for custom applications.
80-240VAC, RoHS, FDA, CE complied
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Singlets are available in a wide variety of shapes. Plano-convex and biconvex lenses have a positive focal length, plano-concave and biconcave lenses have a negative focal length. Meniscus (convex-concave) lenses may be either positive or negative and are used when very long focal lengths are required. Aspheric lenses have one aspherical surface and one spherical or plano surface. They are used principally as light condensers. Spherical ball lenses are ideal for fiber-to-fiber and diode laser-to-fiber coupling. Gradient-index (GRIN) lenses combine refraction at the surfaces with continuous refraction throughout the thickness of the optic.
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Melles Griot offers a family of four distinct, high-performance telecentric lenses for use in machine vision, metrology, and precision gauging applications. All provide low optical distortion and a high degree of telecentricity for maximum, accurate image reproduction, particularly when viewing three-dimensional objects.
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The Laser Mech Lens Mounting System solves the problem of lens removal for replacement and inspection. By using a simple cartridge mounted lens inserted into a side slot in a permanently positioned manifold block, the problems of the traditional threaded, axially inserted lenses are avoided. This innovative mounting method allows removal and replacement of the lens in seconds with no readjustment of the optical alignment and without the removal, replacement or disassembly of any other part of the optical system.
Each assembly consists of a lens mount manifold block with very fine, adjustable lens centering screws and a spring-loaded, lens holder assembly to hold the lens. The lens holder contains all the seals necessary to pressurize the space beneath the lens for use with the Gas Jet Manifold.
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The Laser Mech Lens Mounting System solves the problem of lens removal for replacement and inspection. By using a simple cartridge mounted lens inserted into a side slot in a permanently positioned manifold block, the problems of the traditional threaded, axially inserted lenses are avoided. This innovative mounting method allows removal and replacement of the lens in seconds with no readjustment of the optical alignment and without the removal, replacement or disassembly of any other part of the optical system.
Each assembly consists of a lens mount manifold block with very fine, adjustable lens centering screws and a spring-loaded, lens holder assembly to hold the lens. The lens holder contains all the seals necessary to pressurize the space beneath the lens for use with the Gas Jet Manifold.
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Most microscope objectives are optimized for the same object-to-image distance. This allows objectives to be interchanged without refocusing. Most Melles Griot objectives have an object-to-image distance of 195 mm because long focal lengths are required to maintain both the same image plane (150 mm from the mounting shoulder) and good image quality. All objectives are achromatic and have industry-standard microscope threads for cross compatibility.
The visible, infrared, and infinite-conjugate microscope objectives from Melles Griot are achromatic (i.e., color corrected at 656.3 nm and 486.1 nm). The RMS mounting thread (0.8 inch, 36 TPI) matches the industry standard making these objectives compatible with non- Melles Griot microscopes. Color coding makes identifying objective power easy when numerical markings cannot be seen. Visible objectives are antireflection coated for 400 to 700 nm; infrared objectives are antireflection coated for 1300 to 1500 nm.
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