Refractive Aspherical Diffractive Elements And Hybrids
Description
Aspheric, diffractive, and hybrid refractive diffractive optical elements can be realized affordably with Lexitek’s Near-Index-Match™ (NIM™) optics. These optics can have aspheric or diffractive surfaces at the interface of two materials. The Near-Index-Match™ greatly reduces the cost to master or directly machine the boundary surface and has much looser tolerances compared with aspheric or diffractive surfaces interfaced with air. Near-Index-Match™ optics add a powerful new dimension to optical designers, adding aspheric surfaces and/or diffractive surfaces for aberration correction, achromatization and athermalization. NIM™ optics can be made with glass or plastic substrates and typically have an optical polymer on one or both exterior surfaces. Lexitek uses proprietary fabrication techniques to produce inexpensive, high-quality optics with rapid turn around.
Refractive Aspherical Diffractive Elements And Hybrids
Specifications |
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|---|---|
| Diameter: | 3-100 mm |
| Material: | Not Specified |
| Effective Focal Length: | 3-100 mm |
| Numerical Aperture (NA): | 1 |
| Wavelength Range: | 300-1600nm |
Features
Continuous relief diffractive surfaces
Diffractive layers are buried beneath acontinuous exterior
Aspheric OPDs of 10 - 100 μm
Applications
Achromatization
Athermalization
Beam shaping
Aberration compensation
Null test plates for optical testing
Collimation
Laser diode circularization
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Frequently Asked Questions
Near-Index-Match™ (NIM™) optics are a type of refractive aspherical diffractive elements and hybrids that can have aspheric or diffractive surfaces at the interface of two materials. They greatly reduce the cost to master or directly machine the boundary surface and have much looser tolerances compared with aspheric or diffractive surfaces interfaced with air.
NIM™ optics can be used for achromatization, athermalization, beam shaping, aberration compensation, null test plates for optical testing, collimation, and laser diode circularization.
NIM™ optics can be made in various elements, including plano-plano, plano-convex, plano-concave, meniscus, biconvex, biconcave, and refractive microlens arrays.
NIM™ optics have continuous relief diffractive surfaces, with diffractive layers buried beneath a continuous exterior. They also have aspheric OPDs of 10 - 100 μm.
NIM™ optics have an nf/# of f/1 and slower, a diameter of 3 mm to 100mm, and can be made with plastics or optical glasses as substrates. They are accurate to 2 waves in power and have an irregularity of <0.25 wave, rms.