Micro Multi Slide Dot Pattern and Checkerboard Chart

A glass target produced with low-density chrome at a 10:1 contrast ratio. This high precision test chart allows testing of high-resolution close range cameras at multiple object distances and enables the precise measurement of sharpness, distortion and chromatic aberration.

Multiple measurement areas, with a size ratio of 2:1, enables testing at a wide range of close distances while being able to fill your field of view with testable chart area. This chart is available in two sizes: 100mm (4″) square or 25 x 75mm (1×3″)

For ease of placement and removal, options include an acrylic frame sized for Imatest LED Lightboxes size B through D and Light Panels size A through D.

While this chart should be able to cover a large range of use cases, please contact charts@imatest.com for different sizing or design customization.

Details

4″ Square: Checkerboard Charts

Frequency Zone	Square Size	Dimensions	Distortion Crossing Points HxV
Low	4.000 mm	54.2 x 40.0 mm	13 x 9
Medium	2.000 mm	27.2 x 23.3 mm	13 x 11
High	1.000 mm	27.2 x 16 mm	27 x 16

4″ Square: Dot Pattern Charts

Frequency Zone	Dot Spacing	Dot Diameter	Dimensions	Dots HxV
Low	2.000 mm	0.640 mm	54.2 x 40.0 mm	27 X 20
Medium	1.000 mm	0.320 mm	27.2 x 23.3 mm	27 X 24
High	0.500 mm	0.160 mm	27.2 x 16 mm	32 x 53

1 x 3″ Slide: Checkerboard Charts

Frequency Zone	Square Size	Dimensions	Distortion Crossing Points HxV
Low	1.078 mm	14.5 x 10.8 mm	13 x 9
Medium	0.539 mm	7.3 x 6.3 mm	13 x 11
High	0.269 mm	7.3 x 4.3 mm	27 x 16

1 x 3″ Slide: Dot Pattern Charts

Frequency Zone	Dot Spacing	Dot Diameter	Dimensions	Dots HxV
Low	0.539 mm	0.172 mm	14.2 x 10.4 mm	27 x 20
Medium	0.269 mm	0.086 mm	7.1 x 6.3 mm	27 x 24
High	0.135 mm	0.043 mm	7.1 x 4.2 mm	32 x 53

Testing Images With Imatest

For an example of a macro lens test with this target, see Testing a macro lens using Checkerboard and Micro Multi-slide.

Using Imatest 4.5, the checkerboard region can be analyzed using the Checkerboard module. The dot pattern analysis module has been available since 2011 Release 3.8.

For older versions of Imatest, you can use the distortion module to calculate distortion from the checkerboard, but this is not as resistant to fisheye distortion as what is available with the Checkerboard module of Imatest 4.5.