InFocus Laser Platform M-300 - Manual (Page 63)

5-8 Options & Accessories
Focus Lens Kits
There are three optional Focus Lens Kits available other than the standard 2.0”, they are the 1.5”,
2.5”, and the 4.0” kits. Included in these kits are the focus lens, #3 mirror, front plate,
thumbscrews, and a focus tool.
Different lenses produce different spot sizes and have different focal ranges. For example, the
1.5” lens produces a spot size of .003” and has an effective focal range of +/- .075”. This lens
can engrave very fine detail but can only be used on very flat materials. On the opposite end, the
4.0” lens has a spot size of .013” but has an effective focal range of +/- .2”. Although this lens
cannot engrave very fine detail, its focal range allows you to engrave on slightly rounded or
curved objects without the need for rotation. Using a baseball as an example, focus the beam
halfway between the highest point and the lowest point of engraving. Since a 4.0” lens has a
greater focal range than a shorter lens, you can engrave a considerable distance around the ball
without having to rotate it. Attempting to engrave further around the ball will result in a loss of
engraving power and a distorted image.