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Aspherical Lenses

Aspheric lenses have its advantages in a range of applications where eliminated spherical aberration or (and) single element design is required. CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation.

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1000

Category

Precision Optics

Aspherical Lenses

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Description

Parameters

Cas'Tech Class

Parameters

► Material from DUV to IR

► Custom dimension and shapes

► Diameter from 5 to 200 mm

► Clear aperture: Central 90% of diameter

► Irregularity : λ/10@632.8 nm

► Surface quality: 10-5 S/D

► Centration: ＜3′

► Standard and custom coating options available

► High laser damage threshold

Aspheric lenses have its advantages in a range of applications where eliminated spherical aberration or (and) single element design is required. CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation. CASTECH can provide high precision aspherical lenses based on CNC precision polishing, including aspherical cylindrical, hyperbolic, axicon and free-form lenses.

Metrology

CASTECH employs rigorous verification procedure to guaranty the high performance of our each aspheric lens. Taylor Hobson Form Talysurf PGI profilometer allows contact measurement in grinding process. Used in conjunction with a Zygo interferometer, a CGH (Computer-Generated Hologram) can compensate for the wavefront errors of the optical element under test, and enable zero-position interferometry to obtain high-precision surface figure information.Taylor Hobson LuphoScan 260 non-contact 3D optical surface profilometer performs ultra precision optical surfaces form measurement in polishing process.

Taylor Hobson Form Talysurf PGI Measure range: from 0.1 to 200 mm Resolution ratio: 0.8nm

Taylor Hobson LuphoScan 260 for irregularity measurement
Measure range: from 5 to 260 mm
High surface accuracy: ±50nm

The aspheric cylindrical surface figure tested with CGH

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Aspherical Lenses for eliminating spherical aberration

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Aspherical Lenses
Aspheric lenses have its advantages in a range of applications where eliminated spherical aberration or (and) single element design is required. CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation.

Description

Cas'Tech Class

Parameters

Download

► Material from DUV to IR

► Custom dimension and shapes

► Diameter from 5 to 200 mm

► Clear aperture: Central 90% of diameter

► Irregularity : λ/10@632.8 nm

► Surface quality: 10-5 S/D

► Centration: ＜3′

► Standard and custom coating options available

► High laser damage threshold

Aspheric lenses have its advantages in a range of applications where eliminated spherical aberration or (and) single element design is required. CASTECH offers CNC precision-polished aspherical and acylindrical lenses, with or without anti-reflection (AR) coatings. Our CNC polished aspheric lenses are iteratively ground and polished by a software supported computer-controlled processing center to provide better controlled surface quality, irregularity and focal length deviation. CASTECH can provide high precision aspherical lenses based on CNC precision polishing, including aspherical cylindrical, hyperbolic, axicon and free-form lenses.

Metrology

CASTECH employs rigorous verification procedure to guaranty the high performance of our each aspheric lens. Taylor Hobson Form Talysurf PGI profilometer allows contact measurement in grinding process. Used in conjunction with a Zygo interferometer, a CGH (Computer-Generated Hologram) can compensate for the wavefront errors of the optical element under test, and enable zero-position interferometry to obtain high-precision surface figure information.Taylor Hobson LuphoScan 260 non-contact 3D optical surface profilometer performs ultra precision optical surfaces form measurement in polishing process.