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Level Rods

Targets

Mirrors

Specifications

The 185-10 mirror is often used to verify infinity focus. It may be held in front of the objective lens of any of our transits or levels in order to provide an infinity focus reference, assuming that the instrument is lit internally using one of our lighting attachments. The reflected reticle image then comes into view when the instrument is focused at infinity.

This fused quartz, first surface mirror is optically flat to ¼ wavelength of sodium light, and mounted in a brass holder with a flange on the front surface. Foam lined plastic case is included.

Note: This mirror is not magnetic. For magnetic-backed mirrors, please see our 6202 or 6204

Specifications

A magnetic mirror is used to check the perpendicularity of any flat surface to a line of sight using the optical principles of autoreflection or autocollimation. The 6202 mirror has a circular front surface with a 2½" (63.5mm) diameter. Its reflecting surface is flat to within ¼ wavelength of light over any area not greater than 50 mm in diameter. A single magnet is cemented to the back of the mirror. Its contact surface is ground parallel to the mirror surface within 3 arcseconds. This type of mirror is also a convenient accessory for performing instrument calibrations in the field. You may wish to look at other mirrors on this website.

Specifications

Our 6204 is used for the same purposes as the smaller 6202, but this mirror provides a much larger field of view. This is an advantage when you are autoreflecting or autocollimating at greater distances. Its circular front surface mirror is 4" (101.6mm) in diameter. Its reflecting surface is flat to within ¼ wavelength of light over any area not greater than 50 mm in diameter. Three magnetic feet are cemented to the back of the mirror (see photo in data sheet). Their contact surfaces are ground parallel to the mirror surface to within 3 arcseconds. You may wish to look at the other mirrors we have on this website.