Optical Resolution Charts

The optical resolution charts are used to test characteristics such as resolution, contrast, distortion and modulation transfer function (MTF) of lenses, cameras and optical systems. Ronchi rulings and grids are used to create interference patterns, to measure distortion and for MTF measurements.

EMS offers a range of charts on glass and in metal foil. Customers often require special charts for specific applications and these can be made to your exact requirements.

In addition to these products, we also supply a specialist NPL/HSE test slide for checking the resolving power of phase contrast microscopes – please see ref S84 in stage micrometers.

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Product Name Ordering Info

R70 USAF 1951 Test Chart

Each element has three vertical bars and three horizontal bars. Resolution is specified as the Group and Element of the finest bars that can be clearly defined.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-01 Description: USAF Test Chart Groups 0 to 7 R70 Pack: Each Price: $235.00 Add to Quote:
Cat #: 68098-02 Description: USAF Test Chart Groups -2 to 7 R71 Pack: Each Price: $277.00 Add to Quote:
Cat #: 68098-03 Description: USAF Test Chart, Positive Image, Groups 0/1 to 9/3 R75P Pack: Each Price: $1,386.00 Add to Quote:
Cat #: 68098-04 Description: USAF Test Chart, Negative Image, Groups 0/1 to 9/3 R75N Pack: Each Price: $1,386.00 Add to Quote:
Cat #: 68098-05 Description: USAF Test Chart, Positive Image, Groups 2/1 to 9/3 on SS slide PS75P Pack: Each Price: $1,183.00 Add to Quote:
Cat #: 68098-06 Description: USAF Test Chart, Negative Image, Groups 2/1 to 9/3 on SS slide PS75N Pack: Each Price: $1,155.00 Add to Quote:

Star Test Targets

Siemens Star or Sunburst Pattern vacuum deposited chrome image. Outside diameter of image 25mm. Normal substrate B270 Glass. Overall size 50mm x 50mm.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-08 Description: Star Test Chart Sector Pitch 10 R65 Pack: Each Price: $224.00 Add to Quote:
Cat #: 68098-09 Description: Star Test Chart Sector Pitch 5 Pack: Each Price: $235.00 Add to Quote:

NBS 25 Resolution Chart

A series of gratings diminishing in size as they go towards the central target. Lines range from 3 lines per mm to 20 lines per mm.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-10 Description: NBS 25 Chart 20 Lines per mm Pack: Each Price: $266.00 Add to Quote:

NBS 5 Resolution Chart

This consists of elements of 5 bars ranging from 1 line per mm to 18 lines per mm, with adjacent numbers indicating the number of lines per mm. Produced as a vacuum deposited chrome image on B270 75mm x 75mm glass.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-11 Description: NBS 5 Bar Test Ref 1963A BS 4657 Pack: Each Price: $253.00 Add to Quote:

Sayce Logarithmic Test Chart

R72 Sayce Logarithmic Test chart is a photographic image featuring 90 lines and spaces of gradually decreasing width in logarithmic series. The chart has a base length of 100mm and is supplied on 0.175mm thick ester-based film.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-12 Description: R72 Sayce Logarithmic Test Chart Pack: Each Price: $237.00 Add to Quote:

Grids

Vacuum deposited chrome on glass grid patterns in a variety of pitches. On 75mm x 75mm glass.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-20 Description: Grid with line pitch of 2mm Pack: Each Price: $253.00 Add to Quote:
Cat #: 68098-21 Description: Grid with line pitch of 1mm Pack: Each Price: $253.00 Add to Quote:
Cat #: 68098-22 Description: Grid with line pitch of 0.5mm Pack: Each Price: $253.00 Add to Quote:
Cat #: 68098-23 Description: Grid with line pitch of 0.25mm Pack: Each Price: $253.00 Add to Quote:
Cat #: 68098-24 Description: Grid with line pitch of 0.1mm Pack: Each Price: $253.00 Add to Quote:

Gratings-Ronchi Rulings

Vacuum deposited chrome gratings on glass substrate. Used for testing of resolution, field distortion and parfocal stability. Pair to provide interference patterns.
Cat # Description Pack Price Quote Quantity
Cat #: 68098-25 Description: Grating – Ronchi ruling 2 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled full area Pack: Each Price: $354.00 Add to Quote:
Cat #: 68098-26 Description: Grating – Ronchi ruling 8 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled full area Pack: Each Price: $354.00 Add to Quote:
Cat #: 68098-27 Description: Grating – Ronchi ruling 20 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled full area Pack: Each Price: $354.00 Add to Quote:
Cat #: 68098-28 Description: Grating – Ronchi ruling 40 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled full area Pack: Each Price: $354.00 Add to Quote:
Cat #: 68098-29 Description: Grating – Ronchi ruling 50 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled over 30mm wide Pack: Each Price: $484.00 Add to Quote:
Cat #: 68098-30 Description: Grating – Ronchi ruling 100 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled over 30mm wid Pack: Each Price: $484.00 Add to Quote:
Cat #: 68098-31 Description: Grating – Ronchi ruling 125 lines per mm. — 50mm x 50mm B270 glass, 1.5mm thick, ruled over 30mm wid Pack: Each Price: $484.00 Add to Quote:
Cat #: 68098-32 Description: Grating – Ronchi ruling 200 lines per mm. — 26mm x 10mm soda lime glass grating Pack: Each Price: $495.00 Add to Quote: