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

$ ]! Y, }- e( ]# R
, N) k& q; a- o, v* ~8 A

DSH 1028

Evaluation of spectrum of blue laser-based source projector 1 O: Q8 M- l0 x2 Q% Q* }2 s% B

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
" Y9 K$ D, \% o% R3 ]+ S; [Category
MISC
Subject Keywords Developed by To be approved
' S* b: @2 O9 W! G+ m% FEvaluation of spectrum of blue
laser-based source projector
Laser projector, spectrum,
$ r# `. V* i9 u) r0 }fluorescent layer
ETF 11 2013 CTL
Plenary Meeting
Question
4 [( E+ ]( n6 K0 t, ~6 XA laser-based light engine projector emits a white light spectrum with three dominant colours (see the
  j% {% Y0 W! m0 N2 }optical spectrum, Fig. 1 below, in comparison with the optical spectrum of a mercury lamp projector,
7 r; ?: x0 x) G0 w) a4 W* W1 E9 S$ C7 FFig. 2). The blue light (ca. 440 nm) is generated by a blue laser diode; other wavelengths (with peaks
of green and red) are emitted from a fluorescent layer.
, P3 r7 S+ j: K- uIs it acceptable to evaluate the eye safety hazard according to IEC 60825-1 by only assessing the
# f# `" Q& w' R0 q# ?emission in blue (thus disregarding other parts of the spectrum, i.e. green and red)?
# z+ @/ J0 F# L: F2 E4 I7 _Decision
No. The coherent portion and incoherent portion of the entire spectrum shall be individually evaluated
* Q) E5 I$ h! X$ @; s+ a1 u, ~6 ?2 \to the applicable hazards/requirements per IEC 60825-1 and IEC 62471 respectively.
% t3 M8 x, ~' Q  }2 j' [Measurements for calculations and determination of the respective applicable accessible emission
0 V/ P  ^) G/ O1 ]; |levels must reflect this for each and every possible radiation hazard.
Notes:
6 Q! a% a( N) a, k  g1. 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
+ x2 j8 L0 g0 u& u  Zpower (from this light engine) is measured and considered in the allowable limit calculations. An
appropriate optical device may be used to filter out the blue light for the blue light hazard
measurements and evaluation.
2. Depending on its energy content, the remaining blue laser beam can be a very dangerous
weapon, as it hides inside the seemingly safe broad-band white light to which users would not
# r& W# J( {- _# m/ Kapply 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
, k* q6 k( `4 x2 d- x$ wprecautions shall be adequately taken:
% f! \  r% D% V& g" H  Sa. additional safeguarding
: ~+ V' K5 l- E5 ]5 K9 Xb. means of protection
/ H& ^5 m" X# s4 _8 \' xc. cautionary markings and/or instructions, etc , particularly if the remaining laser beam
* e! b5 |8 Y8 bcontains high energy content.


# z/ i5 h4 v8 s& ~* Z  [; T5 S