Lenses (for Machine Vision)

CA-L series

Overview

Vibration-resistant Lens

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		8 mm	12 mm	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.