Angled facet of lens can effectively reduce the lights reflecting from the facet what would be harmful to the light source. This item applies to the entire lens whose diameter is1.8mmor2.0mmand length is longer than2.3mm.
There are two kinds of angled models can be chosen. One is single angled facet and the other is double angled facet. As to single facet, one facet inclines, the other is vertical to the light axis (Figure11a, 11b); as to double facet, two facets are parallel and incline towards the light axis (Figure11c).
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Item |
Single angled facet |
Double angled facet |
|
Angle (θ) |
2°, 4°, 6°, 8° |
1°, 2°, 3°, 4° |
|
Angle tolerance |
θ ±20’ |
|
|
Tip width |
(0.23) 0.4+0.00/-0.20mm 0.5+0.05/0.20mm |
|
|
Perpendicularity |
90°±20’(flat surface and axis) |
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