EN
menu

The difference between telecentric lens and fixed focal length FA lens

share:

2022/04/12

author:adminBOSS

Industrial imaging applications are empowering manufacturing to automate key functions such as dimensional measurement, defect detection, robotic arm guidance, and image code recognition. The diversity of industrial imaging applications has led to the expansion of lens production, and there are thousands of lens models on the market today. POMEAS can provide various types of zoom lenses, 4K lenses, telecentric lenses, fixed focus industrial lenses, zoom industrial lenses, etc. to meet the growing demand for industrial imaging.

 

 

Each lens has different characteristics and different application scenarios. This article introduces the difference between telecentric lenses and fixed-focus FA lenses, which is helpful for choosing the best matching lens.

 

 

The difference between telecentric lens and fixed focus FA lens:

 

 

For the fixed-focus FA lens, the closer the target object is to the lens, the larger the image will be. The field of view of the fixed-focus lens will increase with the distance, and there will be problems such as large lens distortion and low resolution of the lens. The fixed-focus FA lens is more suitable for detecting the scene where the working distance is fixed and the detection area is the same plane.

 

 

When using a telecentric lens, at a specific working distance, the same magnification will be obtained after refocusing, because the large field of view of the telecentric lens is directly related to the proximity of the lens aperture. The bigger the scene is. The telecentric lens can provide superior image quality with less distortion than traditional fixed focal length lenses. This optical design makes the image plane more symmetrical and can be precisely measured with software.

 

 

Telecentric lenses are better suited for metrology or other applications where the workpiece or feature size needs to remain constant in the imaging plane regardless of working distance changes, e.g. Image measurements on flat and non-planar surfaces at working distance.

 

 

Compared with fixed-focus FA lenses, telecentric lenses usually have smaller system alignment errors, so telecentric lenses also have advantages in single-surface applications that require dimensional measurement accuracy.

TECHNICAL SOLUTION

MORE+

You may also be interested in the following information

FA LENS

  • Download now

    IMAGE 3 Pro Image measuring instrument

  • Download now

    Laser Profile Sensor

  • Download now

    Standard Telecentric Lens PMS-2ST150

  • Download now

    FREE CONSULTING SERVICE

    Let’s help you to find the right solution for your project!

    ADDRESS

    Add.:No.68, Chongwei Road, Baizhoubian, East district, Dongguan, China, 523000

    CONTACT

    Tel:+ 86-0769-2266 0867

    Fax:+ 86-0769-2266 0857

    E-mail:marypeng@pomeas.com

    Wechat QR code

    Copyright © 2020-2080 POMEAS ICP备案号:粤ICP备16046605号 All Rights Reserved

    FOLLOW US:

    Software Copyright :2021SR0176001 抄袭必究, 技术支持:誉新源科技