JD3 Projection Optimeter

PURPOSE
The Projection Optimeter is a high precision length-measuring instrument by comparing measures.It is extensively used to measure grade four and five of standard gauge block (JD20 may measure grade three and four of standard gauge block) and precision parts (as steel ball, roller column, precision parts of ladder shaped etc.) for external dimensions.

Characteristic:
1.High precision, measuring data is reliable
2.Easy operation
3.Construction of working stables adopts exchangeable, assembly and adjustment is quite convenience
4.High quality of imagery, because aberration designed far small than tolerance
5.Adopt various measures for reduce losses of light energy that the brightness at projection screen has raised greatly.Adjustment of filament is sensitivity and reliable

SPECIFICATION
ITEM JD20
Comparative measuring rang
0~180mm

Scale unit of reticule
1¦Ìm

Rang of reticule divisions
±0.1mm

Measuring pressure
200±20 g

External diameter of measuring rod
Φ6db

Instability of indication
0.1¦Ìm

Maximum inaccuracy of the instrument
0.25¦Ìm

Indication error ΔL-Comparative measuring differenc
(0.05+Δ±L/400)¦Ìm

Dimensions
340*160*750mm

Weight:21 Kg

Optical system:
JD3
Lamp 15w
Condenser
Right Angle Prism
Projection Objective
Mirror
Filter
Heat Insulating Glass
Reticule Reflecting Prism
Projection Screen
Reading Magnifier
Autocollimator Objective
Plate Mirror
Measuring Rod
Contact Tip

Main Accessories:
Main accessories Circular flat work table
Circular grooved work table
Square grooved work table
Small three-ball work table
Auxiliary work table
Plane contact tip Φ2 mm
Plane contact tip Φ8 mm
Spherical contact tip R20
Knife edge contact tip 1.5*8
Plane contact tip Φ14 mm

Spare accessories Knife edge contact tip 1*2
Warding block of stand