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2" x 2" (50 lp/inch), Ronchi Ruling

Stock #56-605 3-4 days
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Vacuum Deposited Chrome, OD >3.0
Dimensional Tolerance (inches):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Float Glass
Optical Density OD (Average):
Dimensions (inches):
2 x 2
Surface Quality:
Thickness (mm):
Parallelism (arcmin):
Dimensional Tolerance (mm):
± 0.02
Frequency (lp/inch):
Line to Line Parallelism (arcsec):
Parallelism of Pattern to Substrate (°):
Surface Flatness (P-V):

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 240:

Product Family Description

  • Chrome on Glass
  • High Tolerance
  • Superior to Etched and Filled Rulings
  • Lines Parallel to Edge
  • English and Metric Versions Available

High Precision Ronchi Rulings are excellent for evaluating resolution, field distortion, and parfocal stability. The glass targets are coated with vacuum-deposited chrome and have a float glass substrate. English and Metric version are available with various Linepairs Per Inch (LPI) and Linepairs Per Millimeter (lp/mm) measurements. High Precision Ronchi Rulings are offered in 0.5”, 1", 2", and 4" squares.