The LDC-13 is a universal collimating lens system that fits 9mm diameter base diodes. This housing requires the diode be glued or potted inside the unit. It requires a large screwdriver or spanner to focus the lens which simply screws in place.
Lens type: single element Acrylic, AR coated.
Focal length: .242″, 6.14mm.
Numerical aperture: .28
Beam diameter: .134″, 3.4mm
Base material: anodized Aluminum
Outside dimensions: 1.0″ x .75″ x .75″
Mounting: 2x #440 tapped holes with .625″ spacing on both the bottom, and output side of the unit.