Accessories

Autocollimation Fore Objective

Product description: The autocollimation fore objective is designed for prism angle measurement, mirror parallelism testing, and optical system alignment. It also supports diopter evaluation and image quality inspection,
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Autocollimation Fore Objective

The autocollimation fore objective is a precision optical instrument integrating alignment and measurement functions, equipped with a dual-reticle eyepiece for accurate optical testing and system calibration.

It is primarily used for:

· Prism angular deviation measurement
· Flat mirror parallelism testing
· Angular error evaluation between optical components and reference surfaces

This instrument is widely applied in:
mechanical manufacturing, metrology laboratories, precision instrument production, optical labs, cold processing of optics, and optical system assembly and alignment.

Key Features
1、Measurement of eyepiece diopter range, zero position, and adjustment accuracy
2、Analysis of diopter deviation and zero offset
3、Used as a front objective for image quality and resolution evaluation


20 Model	25 Model	50 Model	80 Model

Technical Specifications

Parameter	Model 20	Model 25	Model 50	Model 80
Focal Length	400 mm	500 mm	1000 mm	1600 mm
Magnification	20^X	25^X	50^X	80^X
Exit Pupil Diameter	2.6 mm	2.5 mm	1.6 mm	2 mm
Eye Relief	18 mm	17 mm	17 mm	17 mm
Field of View	≥ 1°57'	≥ 2°36'	≥ 1°	≥ 20'
Resolution	≤ 2.8"	≤ 2.8"	≤ 1.4"	≤ 0.9"
Diopter Adjustment	±5 diopters	±5 diopters	±5 diopters	±5 diopters
Effective Aperture	Ø50 mm	Ø50 mm	Ø80 mm	Ø148 mm
Autocollimation Scale Value	20"	20"	10"	5"
Weight	7 KG	7.5 KG	16 KG	50 KG