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Pinwheels & Crossed Scales
100% Made in the U.S.A.
 

100 Divisions Per Scale Each Axis

 Part Number Description 
S-14234 Pinwheel Reticle, 0.1000 in. total per axis, 100 div., 0.0010 in. per div.
S-14235 Pinwheel Reticle, 0.2000 in. total per axis, 100 div., 0.0020 in. per div.
S-14237 Pinwheel Reticle, 0.3000 in. total per axis, 100 div., 0.0030 in. per div.
S-14241 Pinwheel Reticle, 0.4000 in. total per axis, 100 div., 0.0040 in. per div.
S-14243 Pinwheel Reticle, 0.5000 in. total per axis, 100 div., 0.0050 in. per div.
S-14249 Pinwheel Reticle, 1.0000 in. total per axis, 100 div., 0.0100 in. per div.
S-14256 Pinwheel Reticle, 1mm total per axis, 100 div., 10 micron per div.
S-14260 Pinwheel Reticle, 4mm total per axis, 100 div., 40 micron per div.
S-14261 Pinwheel Reticle, 5mm total per axis, 100 div., 50 micron per div.
S-14250 Pinwheel Reticle, 10mm total per axis, 100 div., 0.10mm per div.
 

120 Divisions Per Scale Each Axis

 Part Number Description 
S-14239 Pinwheel Reticle, 0.3600 in. total per axis, 120 div., 0.0030 in. per div.
S-14254 Pinwheel Reticle, 12mm total per axis, 120 div., 0.10mm per div.
 

200 Divisions Per Scale Each Axis

 Part Number Description 
S-14245 Pinwheel Reticle, 0.5000 in. total per axis, 200 div., 0.0025 in. per div.
S-14247 Pinwheel Reticle, 0.6000 in. total per axis, 200 div., 0.0030 in. per div.
S-14265 Pinwheel Reticle, 8mm total per axis, 200 div., 40 micron per div.
S-14253 Pinwheel Reticle, 10mm total per axis, 200 div., 50 micron per div.
S-14258 Pinwheel Reticle, 20mm total per axis, 200 div., 0.10mm per div.
 

400 Divisions Per Scale Each Axis

 Part Number Description 
S-14259 Pinwheel Reticle, 20mm total per axis, 400 div., 50 micron per div.
 

Crossed Scales

 Part Number Description 
S-14424 Crossed Scale Reticle, 0.1000 in. total per axis, 100 div., 0.0010 in. per div.
S-14236 Crossed Scale Reticle, 0.2000 in. total per axis, 100 div., 0.0020 in. per div.
S-14238 Crossed Scale Reticle, 0.3000 in. total per axis, 100 div., 0.0030 in. per div.
S-14240 Crossed Scale Reticle, 0.4000 in. total per axis, 100 div., 0.0040 in. per div.
S-14244 Crossed Scale Reticle, 0.5000 in. total per axis, 100 div., 0.0050 in. per div.
S-14248 Crossed Scale Reticle, 0.7000 in. total per axis, 100 div., 0.0070 in. per div.
S-14242 Crossed Scale Reticle, 0.4000 in. total per axis, 200 div., 0.0020 in.  per div.
S-14246 Crossed Scale Reticle, 0.5000 in. total per axis, 200 div., 0.0025 in. per div.
S-14262 Crossed Scale Reticle, 5mm total per axis, 100 div., 50 micron per div.
S-14263 Crossed Scale Reticle, 7mm total per axis, 100 div., 70 micron per div.
S-14264 Crossed Scale Reticle, 8mm total per axis, 100 div., 80 micron per div.
S-14252 Crossed Scale Reticle, 10mm total per axis, 100 div., 0.10mm per div.
S-14251 Crossed Scale Reticle, 10mm total per axis, 100 div., 0.10mm per div., without crossline
S-14255 Crossed Scale Reticle, 15mm total per axis, 100 div., 0.15mm per div.
S-14257 Crossed Scale Reticle, 20mm total per axis, 100 div., 0.20mm per div.

COMMON QUESTIONS

What is an eyepiece reticle?

A reticle is a glass disc with a scale, grid, crossline, or other pattern. It sits at the focus of the eyepiece so the pattern is sharp when the specimen is sharp. Graticule means the same thing.

What diameter do I need?

The disc has to match the eyepiece, not the microscope brand. Common sizes are 19 mm, 21 mm, and 26.5 mm, but we can supply almost any diameter you want. If you are not sure what your eyepiece requires, you will need to measure the opening. A disc that is the wrong diameter will not seat. More on choosing the diameter.

What is the difference between a scale, a grid, and a crossline?

A scale is a line divided into equal parts, for length. A grid is squares, for area and counting. A crossline is two lines that cross, for centering. Other patterns are for angles, particles, or special counts. More on choosing a scale value and Reticle Scale Calculator.

What size scale or number of divisions do I need?

That depends on the smallest feature you want to measure and the objective you will use. The spacing on the reticle is that size times the objective magnification. A 100-division scale then covers 100 times that spacing. The Reticle Scale Calculator can help you with this and also shows the total length of the scale.

Do I need a stage micrometer?

Yes, if you need a real length and not just divisions. The reticle scale is in the eyepiece. A stage micrometer is a known scale on the stage. You compare the two to calibrate that objective. Stage micrometers are listed on their own page.

Can these be calibrated?

Stage micrometers can be supplied with NIST-traceable calibration. An eyepiece reticle by itself is a pattern. The measurement is only calibrated after you compare it to a stage micrometer on your microscope.

Can you make a custom pattern?

Yes. Just send a drawing or a description. Popular custom patterns are a scale, grid, or crossline with your dimensions, a pattern allowing for go/no-go decisions, patterns with comparison dot sizes, etc. If you can describe it we'll be happy to discuss and quote it. We always confirm the final design with you before it is made. More details here.

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