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

12.7mm Dia. λ/20 Fused Silica Optical Flat

Name: 12.7mm Dia. λ/20 Fused Silica Optical Flat
Brand: TECHSPEC
SKU: 43-400-000
Price: ₹10,092

Stock #43-400-000 10 to 12 days

- +

₹6,055 ~~₹10,092~~

Qty 1-10
₹6,055 ~~₹10,092~~

Qty 11+
₹5,481 ~~₹9,135~~

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Imaging Lens Selector

Surface Flatness (P-V):

λ/20

Abbe Number (v_d):

67.8

Coating:

Uncoated

Coefficient of Thermal Expansion CTE (10^-6/°C):

0.52 (+5 to +35°C)
0.57 (0 to +200°C)
0.48 (-100 to +200°C)

Diameter (mm):

12.70 +0.0/-0.50

Thickness (mm):

3.20 ±0.8

Diameter (inches):

0.50 +0.00/-0.02

Thickness (inches):

0.13 ±0.03

Clear Aperture CA (mm):

11.40

Color:

Clear

Construction:

Single Surface

Density (g/cm³):

2.20

Index of Refraction n_d:

1.458

Knoop Hardness (kg/mm²):

522

Parallelism (arcmin):

≤3

Poisson's Ratio:

0.16

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

Fused Silica

Surface Quality:

60-40

Type:

Interferometry Window

Wavelength Range (nm):

200 - 2200

Young's Modulus (GPa):

Bevel:

Protective as needed

Regulatory Compliance

RoHS 2015:

Compliant

Reach 211:

Compliant

Certificate of Conformance:

View

Product Family Description

Sizes Ranging from ½" Diameter to 14" Diameter
Each λ/20 Flat 76.2mm and Larger Includes a Certificate of Calibration
Available with Standard Metallic Mirror Coatings: λ/10 and λ/20 Mirrors

TECHSPEC® Single Surface Optical Flats are used as a reference (test plate) against which the flatness of an unknown surface may be compared. Each piece is precision polished by our master opticians and tested on a Zygo interferometer to insure the surface flatness. The secondary surfaces of our single surface flats are pitch polished to window quality for viewing the interference pattern. TECHSPEC Single Surface Optical Flats ship in a durable storage case for permanent protection. λ/20 flats that are 76.2mm or larger also include a certificate of calibration.

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