Applications and compatible instruments
For visual comparison of resolution over a continuous or closely stepped spatial-frequency range.
Optical Resolution Chart, R72 Sayce
Sayce Logarithmic Resolution Target R72: For visual comparison of resolution over a continuous or closely stepped spatial-frequency range.
Choose by function
What it is and what it does
A changing sequence of line spacings presents a frequency range within one field. A coordinate-to-frequency mapping is needed to interpret the observed limit.
When to choose it
Use a progressive-frequency pattern when the test benefits from seeing a continuous change from coarse to fine detail along a known direction.
How it differs from related products
Checkerboards, dots and grids describe image geometry. Resolution charts describe detail reproduction. A calibration workflow may need both, but they answer different questions.
What can be customised
Pattern size, feature spacing, polarity, usable field, substrate outline and mounting references can be selected around the camera and illumination. Measured geometry and traceable calibration are separate documentation requirements.
What you receive
A glass target in the selected pattern, polarity and substrate format, with the dimensional inspection or calibration records included in the order.
Product-specific applications and pattern selection
Details of this pattern
Configuration & ordering
- Pattern reference: R72; approved artwork and revision
- Active field, scale or feature geometry and optical-plane location
- Material, outside dimensions, thickness and mounting datums
- Working instrument, illumination and viewing side
- Critical tolerances, inspection intervals and reporting needs
Inspection & acceptance
Measure spacing at selected coordinates and verify the frequency map, feature continuity and labels.
Quality & Inspection PhotolithographyWhere this product is used
Compare focus and resolved detail with this optical test pattern.
Common questions
Which details matter when comparing pattern variants?
Specify the frequency endpoints, progression law and target-plane scale. Resizing the artwork changes physical frequency and requires updated labels.
Selection notes
Sayce Logarithmic Resolution Target R72: For visual comparison of resolution over a continuous or closely stepped spatial-frequency range.
Match this artwork reference to its labelled dimensions, polarity and active field. The product image, manufacturing artwork and inspection drawing should identify the same revision.
Information for your inquiry
Artwork reference, labelled geometry, active area, substrate outline, illumination and inspection requirements.
How do I distinguish this reference from another pattern in the same family?
Use the pattern reference and its specific geometry, labels and intended measurement. A similar outline or photograph does not establish the same frequency, coordinates or reading convention.