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          Lenses (for Machine Vision)

          CA-L Series

          Variable-magnification Telecentric Macro Lens Supporting 4/3" Images

          CA-LMHE Series

          Resolution comparison

          120 lines are acquired both for the centre and periphery resolutions, which means that these lenses bring out the full capabilities of 4/3”, 21 megapixel cameras. These are the optimal lenses to use when applying telecentric lenses to line scan cameras.

          21 megapixel camera + CA-LMHE

          Even the extremely detailed parts can be imaged with high contrast.

          21 megapixel camera + CA-LHE + close-up ring

          Even though the magnification is roughly the same, the resolution is insufficient due to the effect of the close-up ring, which means that contrast cannot be obtained.

          Specifications

          Variable-magnification Telecentric Macro Lens Supporting 4/3" Images

          Model

          CA-LMHE20*1

          CA-LMHE0510*1

          Optical magnification

          x2.0

          x0.5 to x1.0

          WD (at reference magnification)

          80.6 mm*2

          x0.5: 80.0m, x1.0: 81.8mm*2

          Compatible image/CCD size

          4/3" (ø23 mm)

          Field of view

          8.9 x 7.1 mm (at reference magnification)

          35.7 x 28.6 mm to 17.8 x 14.3 mm (at reference magnification)

          F-stop range (aperture)

          5.0 to 72

          5.0 to 32

          Resolution

          1.7 µm*3

          x0.5: 6.7 µm, x1.0: 3.4 µm*3

          Resolving power

          Centre/periphery: 120 cycles/mm

          TV distortion

          0.10 %

          Depth of field

          0.320 mm*4

          x0.5: 5.12 mm, x1.0: 1.28 mm*4

          Mount

          C-mount

          Environmental resistance

          Ambient temperature

          0 to +50 °C

          Relative humidity

          35 to 80 % RH (No condensation)

          Weight

          Approx. 830 g

          Approx. 1,050 g

          *1 Depending on factors such as the installation orientation and the vibrations of the environment, consider reinforcing the installation such as by implementing countermeasures to hold the lens in place. For information on the locations to hold the lens in place, see the installation examples.
          The above values were calculated according to optical design values. Actual values for individual lenses will differ according to precision of assembly.
          *2 WD indicates the distance from the tip of the lens to the workpiece. Changing the magnification changes this distance.
          *3 The smallest resolvable feature able to be detected under 550 nm wavelength light.
          *4 The depth of field is a theoretical value calculated with an F-stop of 16 and a circle of least confusion of 40 µm. This varies depending on the F-stop.

          Dimensions

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          Vision / Auto ID