Multi-Frequency Grid Distortion Targets
Edmund Optics
LARGE MEDIUM SMALL A B C
SQUARE LENGTH (mm) 150.00 75.00 37.50
DOT DIA (mm) 3.00 1.50 0.75
DOT SPACING (mm) 6.00 3.00 1.50
• For Calibration of Imaging Systems
• Varying Spatial Frequency for Different Fields of View
• N.I.S.T. Certificate of Accuracy Included
Although distortion can often be troublesome in measurement applications, it is important to note that no information about the object is
actually lost, but merely misplaced in the image. Using these targets, one can easily determine the precise amount of distortion present
and back it out of measurements. The dot center can be located using blob (or centroid) analysis in measurement software. To accommodate
the expanding variety of image analysis software and applications, we offer fixed frequency and variable frequency targets. The
fixed frequency targets are available in a variety of dot size/spacing combinations to complement our full line of imaging lenses. Select
a target to cover your entire field of view while maintaining an adequate number of dots across the field, and an adequate number of
pixels per dot. The 3 or 5 grids on the multi frequency target scale down so that one target can be used for a variety of lenses and fields of
view. Both types of targets are available in a chrome on glass or chrome on opal target to accommodate transmission or reflection based
on applications respectively. Included in the packaging is a serialized N.I.S.T. Traceable Certificate of Accuracy per MIL-STD-45662A.
Substrate: Float Glass or White Opal Glass Float Glass or White Opal Glass
Overall Dimensions (L x W x T) (mm): 76,2 x 76,2 x 1,5* 76,2 x 76,2 x1,5*
Tolerances: Placement of Squares (A, B ,C, D, E) (mm): ±0,004 ±0,004
Dot Diameter (mm): ±0,0025 ±0,0025
Dot Center to Center Spacing (mm): ±0,0025 ±0,0025
Grid Corner to Corner Accuracy (mm): ±0,004 ±0,004
Surface Flatness: 4-6l/25,4 mm area 1l/25,4 mm area
Surface Quality: 40-10 (within 51 mm sq. area) 20-10 (within 51 mm sq. area)
Coating: Vacuum Deposited Chromium Oxide Vacuum Deposited Chromium Oxide
(specular reflectivity <5% @ 550 nm) (specular reflectivity <5% @ 550 nm)
Square: A B C A B C D E
Square Size (center to center of dots) (mm): 50,00 25,00 12,50 50,00 34,00 20,00 10,00 5,00
Dot Diameter (mm): 1,00 0,50 0,25 1,00 0,50 0,25 0,125 0,0625
Dot Center Spacing (mm): 2,00 1,00 0,50 2,00 1,00 0,50 0,25 0,125
Chrome on Float Glass Stock No./Price #46-250 €536,00 #64-864 €649,00
Chrome on Opal Glass Stock No./Price #58-774 €649,00 #64-865 €696,00
*Opal Glass is 3,2 mm Thick
Fixed Frequency Grid Distortion Targets
Target
Dimensions
Pattern Size
(mm)
Substrate: Clear Float Glass White Ivory Glass
Substrate Thickness: 1,5 mm 3,2 mm
Tolerances:
Dot Diameter: ±0,002 mm ±0,002 mm
Dot Center to Center Accuracy: ±0,001 mm ±0,001 mm
Surface Flatness: 4-6l/25,4 mm area 4-6l/25,4 mm area
Surface Quality: 40-20 40-20
Coating: Reflective First Surface Chromium OD > 3,0, Rabs= 50% ±5% @ 550 nm Reflective First Surface Chromium OD > 3,0, Rabs= 50% ±5% @ 550 nm
Dot Dia.
(mm)
Dot Spacing
(mm)
Chrome on Glass Target Chrome on White Glass Target
Overall Accuracy (mm) Stock No. Price Overall Accuracy (mm) Stock No. Price
2" x 2" 25 x 25 0,0625 0,125 ±0,001 #58-509 €557,00 ±0,001 #59-209 €655,00
2" x 2" 25 x 25 0,125 0,250 ±0,001 #58-527 €495,00 ±0,001 #63-983 €582,00
2" x 2" 25 x 25 0,250 0,500 ±0,001 #57-981 €454,00 ±0,001 #59-210 €541,00
2" x 2" 25 x 25 0,250 1,000 ±0,001 #62-209 €412,00 ±0,001 #63-984 €510,00
3" x 3" 50 x 50 0,125 0,250 ±0,001 #59-213 €582,00 ±0,001 #63-985 €773,00
3" x 3" 50 x 50 0,250 0,500 ±0,001 #58-536 €536,00 ±0,001 #63-986 €696,00
3" x 3" 50 x 50 0,250 1,000 ±0,001 #62-211 €521,00 – – –
3" x 3" 50 x 50 0,500 1,000 ±0,001 #57-983 €464,00 ±0,001 #59-211 €655,00
5" x 5" 100 x 100 0,250 0,500 ±0,0015 #59-215 €1.041,00 ±0,0015 #63-988 €1.391,00
5" x 5" 100 x 100 0,250 1,000 ±0,0015 #62-213 €1.025,00 – – –
5" x 5" 100 x 100 0,500 1,000 ±0,0015 #59-217 €1.015,00 ±0,0015 #63-990 €1.334,00
5" x 5" 100 x 100 1,000 2,000 ±0,002 #57-985 €984,00 ±0,002 #59-212 €1.345,00
7" x 7" 150 x 150 0,500 1,000 ±0,002 #62-207 €1.597,00 ±0,002 #63-991 €2.261,00
7" x 7" 150 x 150 1,000 2,000 ±0,002 #58-507 €1.597,00 ±0,002 #63-992 €2.261,00
Diffuse Reflectance Grid Distortion Targets
3 Freq. Glass Target 5 Freq. Glass Target
Chrome on Glass Chrome on White Glass
• Diffuse Reflectance Treatment Mimics Ceramic Targets • Chrome Pattern on Substrate
• No Glare with On or Off Axis Lighting • Perfect for Front Illuminated Measuring
Similar to ceramic targets, the Diffuse Reflectance Grid Distortion Targets have been treated to create a surface which diffusely reflects
light back, avoiding glare across the image surface. Using these targets, one can easily determine the precise amount of distortion present
in an image. The dot center can be calculated using blob analysis in measurement software, and calculated against the standard, to
remove distortion from the image. Offered in 2 substrate sizes and 3 dot frequencies, the targets can be used with a wide variety of lenses
from wide angle to telephoto.
426 +44 (0) 1904 788600 | Edmund Optics® N NEW PRODUCT NEW LOW PRICE
testing & detection targets illumination cameras imaging lenses microscopy lasers optomechanics optics
Diffuse Reflectance Grid Distortion Targets
Target Dimensions Pattern Size (mm) Dot Diameter (mm) Dot Spacing (mm) Dot Size Accuracy Center to Center Accuracy Stock No. Price
2" x 2" 25 x 25 0,0625 0,125 ±3 μm ±1 μm #62-949 €567,00
2" x 2" 25 x 25 0,1250 0,250 ±3 μm ±1 μm #62-950 €546,00
2" x 2" 25 x 25 0,2500 0,500 ±3 μm ±1 μm #62-951 €526,00
3" x 3" 50 x 50 0,1250 0,250 ±3 μm ±1 μm #62-952 €680,00
3" x 3" 50 x 50 0,2500 0,500 ±3 μm ±1 μm #62-953 €649,00
3" x 3" 50 x 50 0,5000 1,000 ±3 μm ±1 μm #62-954 €624,00
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