Welcome to the Xi’an Optical Metrology Photoelectric Technology Co., Ltd.  
 
中文 | Contact Us | E-mail
 
 
 
 
  Technical Principle
 
Principle of photoelectric autocollimator
Principle of photoelectric goniometer
Principle of focal length measurement
Pinciple of the eccentricity measurement of lens
  Applications
 
Autocollimator measuring straightness
Autocollimator measuring flatness
Autocollimator measurement precision rotary turntable
Autocollimator measurement of optical wedge angle and plat
Dihedral angle measurement by AngleAIM goniometer
Centration error measurement by transmission mode
Centration error measurement by reflection mode
Measurement of radius curvature
Flange focal length measurement
Back focal length measurement
Pyramidal error measurement
Spatial parallel adjusting
 
 
  Technical Principle Your location of:Home > Technology > Technical Principle
 

Principle of focal length measurement

2014-12-4 | Editor:Xian optical Metrology | Views:2494 | Content Source:Editor by the company



Definition of focallength

 The distance between the front and back focuses and the principal point is called the focal length. Collimator projects the cross to a plane at infinity. The sample will produce a reticle image on the focal plane. The size of the reticle image depends on the focal length of the collimator objective lens and of the sample. Image processing system can calculate the dimensions and focal length of the division line.

 
 
 
 
 
Print||Close  
 
 
Copyright © 2008-2016 | Xi’an Optical Metrology Photoelectric Technology Co., Ltd. All rights reserved Shaanxi ICP No. 13000505 Power By:XaMu.Cn