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CA-LM Series Lens for Vision Systems

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Features: CA-LM Series

Features 1 | 2 | 3 | 4

Macro Lens

Macro Lens for High-accuracy Measurement of Minute Target Applications.

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Telecentric lenses yield small measurement errors

A telecentric lens has an optical system designed to allow principal rays to pass the focal point. Principal rays pass through the lens in parallel with the optical axis as shown in Figure 2. Consequently, the angle of view is 0°. One of the advantages of telecentric lenses is that the change in the target position causes less change in the size of the captured image, resulting in accurate dimension measurement. A telecentric lens is suitable for dimension measurement or positioning of targets with some height variation.

Fine magnification adjustment feature

Even though the magnification is fixed, the lens features a fine adjustment that enables delicate adjustment of back-focus error.

0% TV distortion

In spite of its compact design, TV distortion is eliminated, enabling highly accurate measurement across the entire FOV.

Telecentric effect

Telecentric lens
CA-LM2

(2.0x optical magnification)

Distance from the camera With a telecentric lens, the 2.5 mm height differential causes only a minimal amount of dimensional variation.

Standard CCTV low distortion lens
50 mm lens

(with 95-mm close-up ring)

Distance from the camera With a CCTV lens, the measurement is affected by the height difference. As the target moves away from the lens, the dimensional measurement becomes smaller.

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