Star Targets
• Ideal for Detection of Focus Errors and Astigmatism
• Frequency Range at Target Center (lp/mm) 7,14 - 229,2
• Available on White Photographic Paper or Chrome on Glass
Star targets are ideal for identifying focus errors, astigmatism, and other aberrations existing in an imaging
system. We have several targets to choose from. Our 60 mm diameter (#58-832 and #58-833) targets feature
an unresolved core of 100 μm, and are ideal for high-resolution or high magnification imaging systems.
Both targets are chrome on glass. Our 4" x 4" targets, available as chrome on glass (#46-247) or photo paper
(#46-246), feature an unresolved core of 2,7 mm, and are designed for mid- to low-range spatial frequencies
common in macro imaging systems.
Star Targets *Sector = 1 transparent/1 opaque pair
Pattern
Diameter
High Precision Ronchi Rulings
Star Target Arrays *Sector = 1 transparent/1 opaque pair
Description Target
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High Precision Ronchi Rulings – English
lp/inch 1" x 1" Target 2" x 2" Target 4" x 4" Target
25 #58-529 €111,94 #58-530 €176,59 #58-531 €313,63
50 #56-592 €117,73 #56-605 €187,21 #56-618 €341,61
100 #56-593 €123,52 #56-606 €197,82 #56-619 €351,26
150 #56-594 €133,17 #56-607 €219,06 #56-620 €384,07
200 #56-595 €138,96 #56-608 €229,67 #56-621 €426,53
250 #56-596 €144,75 #56-609 €240,28 #56-622 €469,95
300 #56-597 €155,37 #56-610 €250,90 #56-623 €511,45
500 #56-598 €165,01 #56-611 €266,34 #56-624 €598,30
750 #56-599 €176,59 #56-612 €282,75 * –
1000 #56-600 €202,65 #56-613 €313,63 #58-460 €800,95
2000 #56-601 €219,06 * – * –
2500 #56-602 €240,28 * – * –
3000 #56-603 €266,34 * – * –
5000 #56-604 €313,63 * – * –
High Precision Ronchi Rulings – Metric *Call for Availability and Pricing
lp/mm 0,5" x 0,5" Target 1" x 1" Target 2" x 2" Target
5 * – #58-775 €123,52 #58-782 €169,84
10 * – #58-776 €133,17 #58-783 €187,21
20 * – #58-777 €155,37 #58-784 €240,28
30 * – #66-347 €176,59 #66-352 €293,36
40 * – #58-778 €202,65 #58-785 €362,84
50 * – #58-779 €224,84 #58-786 €405,30
60 * – #66-348 €234,50 #66-353 €447,76
72 #66-339 €144,75 #66-349 €250,90 #66-354 €479,60
80 #66-340 €155,37 #62-199 €261,51 #62-200 €530,75
100 #66-341 €169,84 #58-780 €276,95 #58-787 €583,82
120 #66-342 €192,03 #62-201 €303,97 #62-202 €627,25
145 * – * – * –
165 * – * – * –
200 #66-345 €245,11 #58-781 €414,95 * –
240 #66-346 €266,34 * – * –
Dimensions
Pattern
Area
Number of
Stars
Individual Star
Diameter
Number of
Sectors*
Frequency
Range
Stock
No. Price
Small Star
Target Array 50 x 50 x 1,5 mm 29,2 x 21 mm 33 2,0 mm 36 2,86 - 57,5 lp/mm #58-834 €289,50
Large Star
Target Array 101 x 101 x 2,0 mm 90 x 90 mm 59 4,5 mm 36 1,27 - 38,5 lp/mm #58-835 €579,00
Target
Dimensions
Thickness
Wedge
Angle
Number of
Sectors*
Unresolved
Core
Substrate
Target Edge Target Center
Stock No. Price
Frequency Line Width Frequency Line Width
50 mm 60 mm Dia. 1,5 mm 10° 36 0,1 mm Float Glass 0,229 lp/mm 2,2 mm 114,6 lp/mm 0,004 mm #58-832 €372,49
50 mm 60 mm Dia. 1,5 mm 5° 72 0,1 mm Float Glass 0,458 lp/mm 1,1 mm 229,2 lp/mm 0,002 mm #58-833 €372,49
62,5 mm 4" x 4" 1,5 mm 6° 60 2,7 mm Float Glass 0,31 lp/mm 1,6 mm 7,14 lp/mm 0,070 mm #46-247 €266,34
62,5 mm 4" x 4" 0,2 mm 3° 120 2,5 mm Photo Paper 0,6112 lp/mm 0,818 mm 15,28 lp/mm 0,033 mm #46-246 €106,15
Star Target Arrays
• Detect Aberrations at Various Field Points
Our star target arrays are designed to identify focus errors and astigmatism along field points in the image
of a vision system. With star targets located at the center, corner, and along the diagonals of the sensor, determining
precision location and amplitude of the problem areas couldn’t be easier, The small array features
unresolved centers of 0,1 mm, whereas the large array features unresolved centers of 0,15 mm.
• Chrome on Glass
• High Tolerance
• Superior to Etched and Filled Rulings
• Lines Parallel to Edge
• English & Metric Versions
Substrate: Float Glass
Thickness: 1,5 mm nominal
Coating: Vacuum Deposited Chrome OD > 3,0
Surface Flatness: 1λ per inch
Surface Quality: 60-40
Parallelism of Pattern
to Substrate: ±1°
Line to Line Parallelism: <2 arcsec
Dimensional Tolerance: ±0,02"
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