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| DSH 656* E R) k8 m6 u$ B* X. a6 B5 {
: {! V S! ^8 ]) P | Equivalent measurement setup for the Condition 1 for certain laser beams 4 `$ X: w% O5 z5 V, k; `
| Clause 9.1 Tests Clause 9.2 Measurement of laser radiation Clause 9.3 Measurement geometry
. w' @8 |# }0 v9 T; b | 60825-1(ed.1);am1;am2 & 60825-1(ed.2)
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0 |. t0 B9 F' V* L; q- VStandard(s):2 t6 B7 D# F. L8 M7 ]7 ?
IEC 60825-1, Ed 1.2 (2001) & Ed 2.0 (2007)
7 s+ O0 u1 p9 H2 v5 ?Sub clause(s):
: i2 q1 N& P9 kClause 9.1 Tests
6 }) w7 z' q6 Z% @3 m/ @7 ^" dClause 9.2 Measurement of laser radiation3 n/ J2 k5 H! n9 ^/ J, \# o
Clause 9.3 Measurement geometry
) R, G$ W- v$ B; A: `7 }Decision Sheet n°: DSH 656
, a5 ?+ w6 {% c0 gSubject: Equivalent measurement setup for the Condition 1 for certain laser beams5 e/ t2 `9 P+ Z/ L& E6 h9 T" F
Key words:
9 N9 ]) a m- b; Z2 s" g+ {- Condition 1
5 H; y3 l' C' v: [2 g2 n3 ^- Telescoping viewing0 i' L4 z) U8 K6 ]0 c
- Aperture stop* k. \9 G. H: A; K
Approved by the 45th CTL Plenary meeting 2008
! Y8 c" f# D6 bQuestion:
/ Z# Q9 ]" e( C8 r; H P3 TIs it necessary to always use a 50 mm aperture stop in order to fulfil the requirements for the measuring Condition 1?$ G; G) q7 c* j0 j: m( I) k6 f( n- P
Decision:1 S+ l5 c% G" f- |: {% q
If the laser beam is well collimated so that the entire radiant power is passing through a 7 mm aperture within 2000 mm distance, it is acceptable to use a 7 mm aperture stop for the purpose of testing according to Condition 1.
# E$ W' n Q1 Z: B& Z- g0 Q7 ZNote: National Certification Bodies shall provide objective evidence that the whole laser beam is captured with the reduced aperture size.
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