DSH 1028 Evaluation of spectrum of blue laser-based source projector

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

. }: P* u* a* w" R; s

DSH 1028

Evaluation of spectrum of blue laser-based source projector

8.3 & 9

60825-1(ed.2)

Standard(s) (incl. year) Subclause(s) No. Year
IEC 60825-1: 2007 (2nd Edition) 8.3 & 9 PDSH
1028
2011
0 |, }) ]2 _/ }) SCategory
% @& ?  ~0 A7 U+ i8 pMISC
+ Z- {9 N5 I5 e. @Subject Keywords Developed by To be approved
9 y. _7 X2 [$ F6 t# w+ MEvaluation of spectrum of blue
laser-based source projector
Laser projector, spectrum,
fluorescent layer
ETF 11 2013 CTL
Plenary Meeting
6 w' y8 b% @# f. O* a6 d7 sQuestion
A laser-based light engine projector emits a white light spectrum with three dominant colours (see the
optical spectrum, Fig. 1 below, in comparison with the optical spectrum of a mercury lamp projector,
, M8 Z( v. \; |7 mFig. 2). The blue light (ca. 440 nm) is generated by a blue laser diode; other wavelengths (with peaks
6 m, |5 G: m1 o  u: Hof green and red) are emitted from a fluorescent layer.
Is it acceptable to evaluate the eye safety hazard according to IEC 60825-1 by only assessing the
7 T" ?1 q. D+ {% femission in blue (thus disregarding other parts of the spectrum, i.e. green and red)?
/ e# x: s5 q( M! u, Z* P) A; R$ iDecision
; s% ^6 S, q/ G2 ]1 |3 VNo. The coherent portion and incoherent portion of the entire spectrum shall be individually evaluated
to the applicable hazards/requirements per IEC 60825-1 and IEC 62471 respectively.
0 |3 o! \0 N; V/ U, xMeasurements for calculations and determination of the respective applicable accessible emission
levels must reflect this for each and every possible radiation hazard.
- L% |3 L8 Q- f/ FNotes:
" |3 H' v, F4 A' K, ?0 s; p. k4 g! C1. Due to the short-wavelength characteristics, which are associated with blue ray hazard, and the
more stringent hazard limit for blue light, this blue light hazard may be over-classified if the total
power (from this light engine) is measured and considered in the allowable limit calculations. An
4 L/ c8 {+ f; [) n* a5 X% tappropriate optical device may be used to filter out the blue light for the blue light hazard
2 v+ b( U3 c/ g8 M" M5 \9 jmeasurements and evaluation.
+ j7 r$ t& f9 P. E2. Depending on its energy content, the remaining blue laser beam can be a very dangerous
+ s" a$ `, Y2 r2 Vweapon, as it hides inside the seemingly safe broad-band white light to which users would not
apply their behavioural/precautionary safety guard as they would to a sharp, bright, and
collimated blue laser beam. During the evaluation of the blue laser beam the following extra
& x$ k+ w5 b' ~- r1 a7 uprecautions shall be adequately taken:
- s8 Y/ o- M$ h/ sa. additional safeguarding
0 v) G$ E, z3 F; q: Ab. means of protection
c. cautionary markings and/or instructions, etc , particularly if the remaining laser beam
; u- \+ |" A! wcontains high energy content.

6 Y) f. K  q+ C* l; N% C
- O/ U- m8 `/ U+ W8 W7 U