Telecentric Lenses

Single-Sided Telecentric

ELWD Macro Invaritar™

ELWD (Extra-Long Working Distance) Macro Invaritar™ telecentric gauging lenses provide exceptional imaging performance and are the best choice for machine vision applications where an extra-long working distance is required.

• Telecentric performance (<0.1° chief ray angle over the entire object field) allows precise gauging of 3-dimensional objects.
• Low distortion (<0.5% over the entire object field) provides highly accurate images.
• Long working distance permits convenient mounting.
• Rugged single-piece design stands up to harsh industrial environments.
• Lockable aperture adjusts to select the required depth of field.
• Standard C-mount camera interface.

ELWD Macro Invaritar™ Lens Specifications

Part # (Click part # to view PDF drawing) Mag. Length Working Distance Maximum Object Dimensions (mm.) 1 F# Range 2 Depth of Field (mm) 3 mm. in. mm. in. 1/3" CCD 1/2" CCD 2/3" CCD 59 LGN 702 2x 186 7.3 116 4.5 1.6 x 2.2 2.2 x 2.9 3.0 x 4.0 5.6 - 16 0.48 59 LGN 703 3x 256 10.1 105 4.1 1.1 x 1.4 1.4 x 1.9 2.0 x 2.6 5.6 - 16 0.32 59 LGN 704 4x 303 11.9 101 4.0 0.8 x 1.1 1.1 x 1.4 1.5 x 2.0 5.6 - 16 0.24 59 LGN 705 5x 362 14.2 98 3.9 0.6 x 0.9 0.9 x 1.2 1.2 x 1.6 5.6 - 16 0.19

The maximum object dimensions shown in the table are 90% of the theoretical maximum dimensions, providing safety factor of magnification and alignment errors. ƒ/# specified in object space. Depth of field is calculated at the largest available for each lens ƒ/# and for a 30-µm allowable blur at the image (camera).