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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Dia -0.25λ Aberration, Spherical Aberration Plate

Spherical Aberration Compensation Plates

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Stock #66-756 10 to 12 days
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₹47,850
Qty 1+
₹47,850
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Aberration:
-0.25λ ±λ/16 @ 587nm

Product Details

Type:
Specialty Window

Physical & Mechanical Properties

Bevel:
Protective as needed
Clear Aperture (%):
>85
Clear Aperture CA (mm):
21.25
Diameter (mm):
25.00 +0.00/-0.25
Thickness (mm):
4.00 ±0.20
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
610
Parallelism (arcmin):
<1
Poisson's Ratio:
0.206
Young's Modulus (GPa):
82

Optical Properties

Abbe Number (vd):
64.17
Coating:
Uncoated
Index of Refraction nd:
1.516
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Quality:
60-40
Wavelength Range (nm):
350 - 2200

Material Properties

Coefficient of Thermal Expansion CTE (10-6/°C):
7.1 (-30 to +70°C)
8.3 (+20 to +300°C)
Density (g/cm3):
2.51

Regulatory Compliance

RoHS:
Certificate of Conformance:

Product Family Description

  • Precision N-BK7 Substrate
  • Optimized for Use in Collimated Light with Small Fields of View
  • Transmitted Wave Front Accurate to λ/16

Many optical systems experience some level of spherical aberrations which result in a loss of image quality and overall system performance. Our line of TECHSPEC® Spherical Aberration Compensation Plates are designed to compensate and correct known amounts of spherical aberration at the specified wavelengths. The aberration plates should be used in collimated space and placed near a pupil. They are excellent for correcting spherical aberrations in systems that have small fields of view.

Spherical Aberration Compensation Plates can be combined to induce the desired amount of compensatory spherical aberration. Negative sign plates create over corrected spherical aberration. Positive plates create under corrected spherical aberration.

Note: The arrow on the spherical aberration compensation plates points in the direction of light travel.

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