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1/4λ Spherical Mirrors

Aluminum Coating
Ideal for UV, Visible, and IR Applications
Multiple Diameter and f/# Combinations Available

¼λ Spherical Mirrors have flat rear surfaces and aluminum coated spherical front surfaces. These mirrors are ideal for applications in UV, visible, and IR wavelength ranges.

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Spherical Mirror 10mm Dia x 10mm Focal Length

#46-231

$29.50

Diameter (mm)	10.00
Effective Focal Length EFL (mm)	10.00
Radius R (mm)	20.00
Aperture (f/#)	1.00
Edge Thickness ET (mm)	3.63
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Compliant

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Spherical Mirror 10mm Dia x 20mm Focal Length

#46-232

$29.50

Diameter (mm)	10.00
Effective Focal Length EFL (mm)	20.00
Radius R (mm)	40.00
Aperture (f/#)	2.00
Edge Thickness ET (mm)	3.31
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 10mm Dia x 40mm Focal Length

#46-233

$29.50

Diameter (mm)	10.00
Effective Focal Length EFL (mm)	40.00
Radius R (mm)	80.00
Aperture (f/#)	4.00
Edge Thickness ET (mm)	3.16
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 15mm Dia x 15mm Focal Length

#46-234

$35.00

Diameter (mm)	15.00
Effective Focal Length EFL (mm)	15.00
Radius R (mm)	30.00
Aperture (f/#)	1.00
Edge Thickness ET (mm)	5.01
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Compliant

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Spherical Mirror 15mm Dia x 30mm Focal Length

#46-235

$35.00

Diameter (mm)	15.00
Effective Focal Length EFL (mm)	30.00
Radius R (mm)	60.00
Aperture (f/#)	2.00
Edge Thickness ET (mm)	3.47
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 15mm Dia x 60mm Focal Length

#46-236

$35.00

Diameter (mm)	15.00
Effective Focal Length EFL (mm)	60.00
Radius R (mm)	120.00
Aperture (f/#)	4.00
Edge Thickness ET (mm)	3.23
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 20mm Dia x 20mm Focal Length

#46-237

$37.50

Diameter (mm)	20.00
Effective Focal Length EFL (mm)	20.00
Radius R (mm)	40.00
Aperture (f/#)	1.00
Edge Thickness ET (mm)	4.27
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 20mm Dia x 40mm Focal Length

#46-238

$37.50

Diameter (mm)	20.00
Effective Focal Length EFL (mm)	40.00
Radius R (mm)	80.00
Aperture (f/#)	2.00
Edge Thickness ET (mm)	3.63
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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Spherical Mirror 20mm Dia x 80mm Focal Length

#46-239

$37.50

Diameter (mm)	20.00
Effective Focal Length EFL (mm)	80.00
Radius R (mm)	160.00
Aperture (f/#)	4.00
Edge Thickness ET (mm)	3.31
Center Thickness CT (mm)	3.00
Surface Quality	60-40
Surface Accuracy (λ)	1/4
Coating	Protected Aluminum, R_avg >85% @ 400 - 700nm
Substrate	N-BK7
Diameter Tolerance (mm)	+0/-0.30
Focal Length Tolerance (%)	±2
Center Thickness Tolerance (mm)	±0.30
Edges	Ground
Back Surface	Ground
RoHS	Exempt

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1/4λ Spherical Mirrors

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