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6D autocollimator - Darkfield model is perfect for measuring small, flat mirrors.

nikon metrology autocollimators 6B 6DNikon's 6B autocollimator checks alignment and measures very small angular deviations to measure flatness or height by simple geometry. The 6D darkfield model projects a bright crossline and is the most popular model because the bright-line cross is the easiest to see. Provides measuring accuracy down to 0.5 arc seconds.

Key benefits:

  • Efficient measurement - the autocollimator needs only the setting of a target mirror and collects reflected light rays
  • Simultaneous measurement of vertical and horizontal axis values


  • Surface analysis
Benefits & features

Half second measuring accuracy

Readings of angular displacement of 0.5 second of arc using an easy-to-read large-diameter micrometer drum.

70 mm aperture lenses

The 6D employs a 70 mm aperture lens to product clear, reflected images. It also features extremely accurate double line reticles for improved detection.

Viewfield diagram

The 6D Autocollimator makes high-precision measurements simultaneously on two axes with the darkfield technique. It projects a bright crossline and Nikon's most popular model because the bright-line cross is the easiest to see.

Field of View Dark viewfield with bright cross-line
Telescope magnification 38x
Objective F=700 mm; effective aperture 70 mm with parallax (flatness) correction adjustment.
Readout Read minutes from the markings on the X and Y main scales. 0-30 minutes of arc X and Y in 1 minute increments. A micrometer drum marked 0-60 Seconds of arc with minimum reading 0.5 seconds.
Measuring accuracy Autocollimator Stand Type 3 - Heavy duty with unique precision 2 axis targeting adjustment knobs. Spiral column height adjustment as well as 360° tilt, swivel and rotation.
Light source 6 V/20 W transformer available in 120 V and 240 V AC models
System components Autocollimator type 6D or 6B, Type C adjustable stand and 6 V 20 W transformer
Weight Autocollimator and stand - approximately 30 kg (66 lbs)


Industrial applications