The Optical Micrometer is capable of making non-contact measurements on any surface, curved or flat.  This instrument is useful for measuring depth of scratches, fractures, crazing, embedded voids and thickness of transparent materials (i.e. glass, acrylic). It can also measure scratches, cracks, corrosion, pits, blemishes, small dents and other imperfections.  Using the optional reticle eyepiece on Model 966A, width measurements up to 0.040" can be made.  This portable instrument is ideal for field applications such as windshields, leading edges, airframes, fuselage skin, propeller blades, rotor blades, turbine blades, coated surfaces, plus many more.
 
The Optical Micrometer is designed with a rugged housing and easy-to-read vernier scale.  Model 966 provides 100x power permitting depth measurement up to 0.665".  Model 966A provides 200x power, which allows depth measurement up to 0.260".  Both models are supplied with a standard tripod base that can be used on flat or simple curved surfaces.
 
To take a surface measurement, the operator positions the Optical Micrometer over the area to be examined.  After proper focusing, the operator takes a reading at the highest surface in the specific area.  A second reading is taken at the lowest surface, and measurement is calculated by computing the difference between the two readings.
 
Optical Micrometer Features 
966
966A
Magnification
100X
200X
Optics Working Distance (depth measurement)
0.6650
0.2600
Micrometer Working Distance
1.0000
1.0000
Material Thickness (transparent)
0.9975
0.3900
Accuracy
±0.0005
±0.0002
Image Area
0.090 dia.
0.060 dia.
Image Focal Plane
±0.0002
±0.0001
With reticle eyepiece (P/N 966AR)
 
 
      Width
N/A
up to 0.040
      Accuracy
N/A
0.001
 
Units of measurement are shown in inches