Off-Axis Parabolic Metal Mirrors

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  • Aluminum Substrate Mirrors
  • Available in 30°, 60°, or 90° Off-Axis
  • Mounting Plates Also Available

Aluminum substrate mirrors are also available as 30°, 60°, or 90° off-axis parabolic reflectors. Off-axis parabolic mirrors are only a section of the parabola form. Unlike standard parabolic mirrors, these mirrors direct and focus incident collimated light at a specific angle, allowing unrestricted access to the focal point (see diagram). Typically used as collimators in Schlieren and MTF systems, our gold coated off-axis parabolic mirrors can also be used in FLIR test systems. Due to the 175Å surface roughness, they are not suitable for visible and ultraviolet applications that require low scatter.

25.4mm Diameter and 50.8mm Diameter Mirrors have (3) 6-32 TPI tapped holes (on 3/4" Bolt Circle for 25.4mm Dia, 1.25" Bolt Circle for 50.8mm) for easy, accurate mounting; 76.2 mm Diameter Mirrors have (3) 8-32 TPI tapped holes (on 2.25" Bolt Circle) for mounting. Mounting plates sold separately.

Mounting Plates for Off-Axis Parabolic Mirrors

The black anodized aluminum (6061-T6) adapter plates have three bored holes to allow the off-axis mirrors to be securely mounted in standard optical equipment. Adapter plates also feature four 1/4-20 tapped holes for threading onto standard post holders. Three socket head cap screws included.

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Description Stock No. Price In Stock  
Showing 1-20 of 68 Items | Show All Items | Sort by Spec
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25.4 x 381mm 15 Degree Off Axis Parabolic Aluminum Mirror
NT69-153 $190.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 387.60
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 3.95
RoHS Compliant
25.4 x 381mm 15 Degree Off Axis Parabolic Gold Mirror
NT69-154 $300.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 387.60
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 6.54
RoHS Compliant
25.4 x 635mm 15 Degree Off Axis Parabolic Aluminum Mirror
NT69-155 $190.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 654.99
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 6.54
RoHS Compliant
25.4 x 635mm 15 Degree Off Axis Parabolic Gold Mirror
NT69-156 $300.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 654.99
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 3.16
RoHS Compliant
50.8 x 604.8mm 15 Degree Off Axis Parabolic Aluminum Mirror
NT69-157 $245.00 In stock and ready to ship. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 50.8
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 310.08
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 3.16
RoHS Compliant
50.8 x 604.8mm 15 Degree Off Axis Parabolic Gold Mirror
NT69-158 $350.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 50.8
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 310.08
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 5.27
RoHS Compliant
50.8 x 508mm 15 Degree Off Axis Parabolic Aluminum Mirror
NT69-159 $245.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 50.8
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 516.81
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 5.27
RoHS Compliant
50.8 x 508mm 15 Degree Off Axis Parabolic Gold Mirror
NT69-160 $350.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 15° Off-Axis
Diameter (mm) 50.8
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 516.81
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 3.31
RoHS Compliant
25.4 X 25.4mm 30 Degree Off Axis Parabolic Aluminum Mirror
NT63-180 $215.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 27.22
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 13.61
RoHS Compliant
25.4 X 25.4mm 30 Degree Off Axis Parabolic Gold Mirror
NT63-192 $315.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 27.22
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 13.61
RoHS Compliant
25.4 X 50.8mm 30 Degree Off Axis Parabolic Aluminum Mirror
NT47-085 $145.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 54.45
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 27.20
RoHS Exempt
25.4 X 50.8mm 30 Degree Off Axis Parabolic Gold Mirror
NT47-086 $255.00 Click to receive an email with delivery information. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 54.45
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 27.20
RoHS Exempt
50.8 X 50.8mm 30 Degree Off Axis Parabolic Aluminum Mirror
NT47-087 $315.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 50.80
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 54.45
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 27.20
RoHS Exempt
50.8 X 50.8mm 30 Degree Off Axis Parabolic Gold Mirror
NT47-088 $380.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 50.80
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 54.45
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 27.20
RoHS Exempt
50.8 X 101.6mm 30 Degree Off Axis Parabolic Aluminum Mirror
NT47-089 $280.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 50.80
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 108.89
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 54.50
RoHS Exempt
50.8 X 101.6mm 30 Degree Off Axis Parabolic Gold Mirror
NT47-090 $355.00 In stock and ready to ship. Click to add this item to your cart.
Type 30° Off-Axis
Diameter (mm) 50.80
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 108.89
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 54.50
RoHS Exempt
25.4 x 101.6mm 45 Degree Off Axis Parabolic Aluminum Mirror
NT69-161 $295.00 In stock and ready to ship. Click to add this item to your cart.
Type 45° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 119.02
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 3.31
RoHS Compliant
25.4 x 101.6mm 45 Degree Off Axis Parabolic Gold Mirror
NT69-162 $400.00 In stock and ready to ship. Click to add this item to your cart.
Type 45° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 119.02
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 4.14
RoHS Compliant
25.4 x 127mm 45 Degree Off Axis Parabolic Aluminum Mirror
NT69-163 $295.00 In stock and ready to ship. Click to add this item to your cart.
Type 45° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 148.79
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Aluminum
Y Offset (mm) 4.14
RoHS Compliant
25.4 x 127mm 45 Degree Off Axis Parabolic Gold Mirror
NT69-164 $400.00 In stock and ready to ship. Click to add this item to your cart.
Type 45° Off-Axis
Diameter (mm) 25.4
Diameter Tolerance (mm) +0.00/-0.381
Focal Length Tolerance (%) ±1
Surface Accuracy (λ) 1/4 RMS
Effective Focal Length EFL (mm) 148.79
Surface Roughness (Angstroms) <175 RMS
Substrate Aluminum 6061-T6
Coating Protected Gold
Y Offset (mm) 1.66
RoHS Compliant
 View Legend
Description Stock No. Price In Stock  
Showing 1-3 of 3 Items | Sort by Spec
Mounting Plate for 25.4mm Diameter Off Axis Mirror
NT47-111 $80.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 50.8
Thickness (mm) 7.925
Mounting Threads 6-32 TPI, 19.05mm Bolt Circle
RoHS Compliant
Mounting Plate for 50.8mm Diameter Off Axis Mirror
NT47-112 $90.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 76.2
Thickness (mm) 9.525
Mounting Threads 6-32 TPI, 31.75mm Bolt Circle
RoHS Compliant
Mounting Plate for 76.2mm Diameter Off Axis Mirror
NT63-375 $100.00 In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 101.6
Thickness (mm) 12.700
Mounting Threads 8-32 TPI, 57.15mm Bolt Circle
RoHS Compliant
 Sort by Spec
Dimensional Specifications
Diameter (mm) Parent FL (mm) EFL (mm) Y Offset (mm) A (mm) B (mm) C (mm) Stock No.
Protected Aluminum Protected Gold
15° Off-Axis Mirrors
25.4 381.0 387.60 100.33 9.65 382.27 6.35 #69-153 #69-154
25.4 635.0 654.99 167.20 9.65 631.95 6.35 #69-155 #69-156
50.8 604.8 310.08 80.26 12.95 308.61 6.35 #69-157 #69-158
50.8 508.0 516.81 133.75 12.95 508.51 6.35 #69-159 #69-160
30° Off-Axis Mirrors
25.4 25.4 27.22 13.61 13.20 31.75 6.35 #63-180 #63-192
25.4 50.8 54.45 27.22 12.20 56.13 6.35 #47-085 #47-086
50.8 50.8 54.45 27.22 20.06 57.15 6.35 #47-087 #47-088
50.8 101.6 108.89 54.45 20.06 105.92 6.35 #47-089 #47-090
45° Off-Axis Mirrors
25.4 101.6 119.02 84.17 16.76 95.50 6.35 #69-161 #69-162
25.4 127.0 148.79 105.20 16.76 116.59 6.35 #69-163 #69-164
50.8 50.8 59.51 42.08 27.43 55.88 6.35 #69-165 #69-166
50.8 76.2 89.28 63.11 27.43 77.98 6.35 #69-167 #69-168
60° Off-Axis Mirrors
25.4 25.4 33.85 29.33 21.08 28.96 6.35 #47-091 #47-092
25.4 38.1 50.80 43.99 21.08 38.10 6.35 #47-093 #47-094
25.4 50.8 67.74 58.64 21.08 47.74 6.35 #63-181 #63-193
50.8 50.8 67.74 58.64 35.56 51.82 6.35 #63-169 #63-170
50.8 76.2 101.60 87.98 35.56 69.60 6.35 #63-182 #63-194
50.8 101.6 135.45 117.32 35.56 87.12 6.35 #91-171 #91-172
90° Off-Axis Mirrors
25.4 12.7 25.40 25.40 31.75 15.75 6.35 #47-095 #47-096
25.4 25.4 50.80 50.80 31.75 17.53 6.35 #47-097 #47-098
25.4 38.1 76.20 76.20 31.75 18.03 6.35 #63-183 #63-195
25.4 50.8 101.60 101.60 31.75 18.29 6.35 #47-099 #47-100
25.4 76.2 152.40 152.40 31.75 18.54 6.35 #63-184 #63-196
50.8 25.4 50.80 50.80 57.15 25.40 6.35 #47-103 #47-104
50.8 38.1 76.20 76.20 57.15 27.43 6.35 #47-105 #47-106
50.8 50.8 101.60 101.60 57.15 28.45 6.35 #47-107 #47-108
50.8 76.2 152.40 152.40 57.15 29.72 6.35 #47-109 #47-110
50.8 88.9 177.80 177.80 57.15 29.97 6.35 #63-185 #63-197
50.8 95.3 190.50 190.50 57.15 29.97 6.35 #63-186 #63-198
76.2 25.4 50.80 50.80 83.82 31.50 7.62 #63-187 #63-199
76.2 38.1 76.20 76.20 83.82 36.07 7.62 #63-188 #63-200
76.2 63.5 127.00 127.00 83.82 39.88 7.62 #63-189 #63-201
76.2 76.2 152.40 152.40 83.82 40.89 7.62 #63-190 #63-202
76.2 88.9 177.80 177.80 83.82 41.66 7.62 #63-191 #63-203
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