RTK-65 Series

Attribute:

Telecentric Lens (W.D.65mm Type)

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Compact size and ideal for embedded applications! W.D.65mm type with deep depth of field

● Can be used as a medium to high magnification macro lens.
● There is no expansion or contraction of the object within the depth of focus.
● You can reduce the ambient distortion due to parallax.
● You can choose the focal length.
● When used with coaxial lighting, uneven illuminance of the object can be reduced.

Model NumberRTK-0.8-65RTK-1-65RTK-1.5-65RTK-2-65RTK-3-65RTK-4-65RTK-6-65RTK-8-65
Optical Magnification0.8x1x1.5x2x3x4x6x8x
Working Distance
(W.D)
65mm65.3mm68.2mm65mm61.8mm65mm64.2mm63.8mm
Depth of field
*1
1.85mm1.33mm0.44mm0.33mm0.22mm0.13mm0.09mm0.06mm
Resolution
*2
12.4μm11.2μm5.6μm5.6μm5.6μm4.3μm4.4μm4.4μm
Numerical Aperture
(N.A)
0.0270.030.060.060.060.0780.0770.077
Effective F-Number14.916.812.616.725.125.839.152
TV Distortion-0.003%0.00%0.031%-0.005%-0.008%-0.01%0.004%0.004%
Weight41g36g33g35g40g34g40g46g
Compatible Camera Sensor 1/2 type
Lens MountC Mount
Field Of View
1/3 inch Camera
(H x V)
6.0mmx4.5mm4.8mmx3.6mm3.2mmx2.4mm2.4mmx1.8mm1.6mmx1.2mm1.2mmx0.9mm0.8mmx0.6mm  0.6mmx0.45mm
Field Of View
1/2 inch Camera
(H x V)
8mmx6mm6.4mmx4.8mm4.27mm3.2mm3.2mmx2.4mm2.13mmx1.6mm1.6mmx1.2mm1.07mmx0.8mm0.8mmx0.6mm

*1 Calculated value calculated with a permissible circle of confusion diameter of 40 μm
*2 Theoretical resolution calculated at a wavelength of 550 nm

Main Features
A telecentric lens is a lens that has a constant magnification at any position within the object distance. There is no change in magnification within the depth of field. There is no image distortion due to the field of view, and the accuracy of shape measurement of deep parts is greatly improved. VGA compatible

Features of Telecentric Lenses
1.Can be used as a medium to high magnification macro lens.
→ The price will be higher than the macro lens, but the performance will also be improved.
 
2.There is no expansion or contraction of the object within the depth of focus.
 → Measurement error can be reduced when measuring dimensions.
 
3.You can reduce the ambient distortion due to parallax.

4.You can choose the focal length.

Short-distance type WD65mm and long-distance type WD110mm available

5.When used with coaxial lighting, uneven illuminance of the object can be reduced.

Non-coaxial type and coaxial lighting type are available

Example of use
Comparison between using a telecentric lens and using a macro lens

Use a macro lens

Uses a telecentric lens

When using a macro lens, distortion can be seen due to parallax between the center and edges of the screen, even when shooting an object from directly above.
However, when using a telecentric lens, distortion due to parallax between the center and edges of the screen is extremely small, allowing accurate image information to be obtained regardless of where the object is displayed on the screen.

Inquire about this product
Tel: 02-664-2246
Mail:info@shodensha.co.th
Business hours 8.30 - 17.30 (Closed on weekends & public holidays)

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