Lenses (for Machine Vision)

CA-L series

Vibration-resistant Lens

CA-LHxG Series

Strong vibration resistance together with ease of use

The industry’s first fixed aperture replacement method
By using fixed apertures, we have eliminated the problem of foreign contamination occurring due to the aperture drive section rubbing against another surface when the lens is subjected to vibrations. At the same time, the ability to replace aperture plates ensures support for different situations. Because the aperture values are fixed, it is easy to ensure that multiple units all use the same F-stop.

Fixing the focus with the red ring

After adjusting the lens extending amount, use the red ring to fix the focus. The construction of this fixing section differs from the pinpoint operation of a screw and performs fixing with a wide area, which makes it difficult for looseness to occur. The sufficient focus adjustment width enables both a minimum working distance of 0.1 m and ease of use.

Specifications

Low Distortion Lens

Model

CA-LH8G

CA-LH12G

CA-LH16G

CA-LH25G

CA-LH35G

CA-LH50G

Type

Vibration-resistant models

Compatible image/CCD size

2/3"

Focal point

8mm

12mm

16 mm

25mm

35 mm

50 mm

F-stop range (aperture)

F1.4/4/8/16*1

F2.0/4/8/16*1

F2.8/4/8/16*1

Minimum WD

0.1 m*2

0.15 m*2

0.2 m*2

Resolving power

100 cycles/mm at centre, 80 cycles/mm on periphery

Filter size

27.0 mm P0.5

TV distortion

-0.6%
(-0.28%)*3

-0.07%
(-0.04%)*3

-0.05%
(-0.1%)*3

-0.04%
(-0.02%)*3

-0.2%
(-0.05%)*3

-0.03%
(-0.01%)*3

Mount

C-mount

Environmental
resistance

Ambient temperature

0 to +50°C

Relative humidity

35 to 80% RH (No condensation)

Weight

Approx. 78 g

Approx. 65 g

Approx. 66 g

Approx. 73 g

Approx. 62 g

Approx. 76 g

*1 The vibration-resistant types are designed to have their apertures replaced. When shipped, the OPEN aperture is attached to the lens, so replace this with one of the other included apertures (F4, F8, or F16) as necessary. To use the f-stop (aperture) in the OPEN mode, use the lens without removing the OPEN aperture.
*2 Installing the lens at a distance from the target shorter than the minimum working distance listed in the specifications makes it very likely that the lens will drop out due to vibrations. If the lens is installed in such a position, implement separate countermeasures to prevent the lens from dropping out.
*3 This indicates the specification for the compatible image/CCD size. The value in parentheses applies to a 1/3" image/CCD size.

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