Optical Field Lens

Optical Field Lens

Optical Field Lens, also called f-theta lens is for monochromatic light imaging. Its image surface is a plane, and the image quality of the entire image surface is consistent. The aberration is small, and there is no vignetting. For a certain incident light deflection speed corresponds to a certain scanning speed, so the linear scanning can be realized with the incident light of equal angular velocity. The deflection position of the incident beam is generally placed at the front focal point of the object space, and the chief ray of the image side is parallel to the optical axis, which can achieve consistent on-axis and off-axis image quality to a large extent, and improve the uniformity of illumination. It is widely used in lasers marking.

Features

The diameter of focused spot is proportional to the focal length. This means that when the scanning area of the Optical Field Lens reaches a certain level, the obtained spot diameter is very large, that is to say, the laser power density drops very quickly (the power density is inversely proportional to the 2nd power of the spot diameter), which is conducive to processing. While general focusing lenses deliver a focused spot to only one point, they deliver a focused spot to many points on a scan field or work piece.

Application

They are commonly used in laser engraving, cutting, marking systems, etc.

Parameters

Lens pictures

About us

Our company adheres to the policy of 'comprehensive service, professional operation and efficient transportation' and the tenet of 'let customers save time and worry'. We are dedicated to providing every customer with comprehensive service and high-quality Optical Field Lens.  We sincerely thank our customers for their loyalty and trust in our company and our suppliers and all our partners for their close cooperation. We will continue to work hard to establish long-term cooperative relations with new and old customers at home and abroad, treat each other with sincerity and create a better future together.

FAQ

Q1: How to choose the laser working area?

A: Base on your laser power and marking logo size we can select the right focal length;

Q2: Which laser need fiber laser focal length?

A: The laser with scanner head, which needs the lens for focusing the lasers, and it needs match with different beam expander.