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1.
INTRODUCTION
1.1
ADVANTAGES AND FEATURES
During the recent years the mass production of different types of lasers has made them eco-
nomically viable products for a broad range of applications, dust monitors among others.
There are two main families of lasers:
Gas lasers, notably Helium-Neon (He-Ne) lasers are available in compact design in-
cluding their hi-voltage power source
Newer Semiconductor lasers today with red, visible beam and with added benefit of
integral power monitoring diode
There are major benefits from using a laser light source whose main features are given be-
low:
Very compact beam. The intense light beam of the laser is typically only a few millimeters
thick. This means that only smal
l holes (10 … 50 mm) are needed in the stack which
simplifies the installation
Good stability and long life. In contrast to designs that use more traditional light bulbs,
which need constant compensation, the laser source is relatively immune to aging ef-
fect. The typical self-life of gas laser is 3 years, and up to 10 years for semiconductor
units. When gas laser fails it is easy to notice as it begins to flicker, much like a fluo-
rescent tube.
Relatively high intensity. Because the laser light power is concentrated at small area, it can
penetrate higher dust densities than conventional light sources.
Operation with known clearly defined wavelength. This makes the theoretical calculations
and their results more predictable as opposed to conventional sources that operate
over broad range of wavelengths and whose spectrum changes with age.
Finally, we would like to mention also our latest light source, the superbright LED that has
many laser-
like features. It offers an economic alternative to “real” lasers in some applica-
tions. These superleds are very recent developments and offer the highest recorded output
power of LED-lamps. The radiation happens with very narrow wavelength range, around 640
nm (red) and concentrates on a small cone (4
). Our novel stabilizing scheme makes these
superleds fully compatible with semiconductor lasers in the short distance measurements
(<2m).
Summary of Contents for LM 3188
Page 24: ...Page 24 41 APPENDIX 1 Monitor Unit M 318 mech drawing ...
Page 26: ...Page 26 41 APPENDIX 3 Receiver unit R318 mech drawing R318 Receiver unit 820 005 and 820 006 ...
Page 28: ...Page 28 41 APPENDIX 5 Receiver unit R318 mech drawing R318 Receiver unit 820 000 and 820 001 ...
Page 29: ...Page 29 41 APPENDIX 6 Transmitter unit L318 mech drawing L318 Transmitter unit 830 005 ...
Page 32: ...Page 32 41 APPENDIX 9 Laser Unit L 318 PCB layout ...
Page 33: ...Page 33 41 APPENDIX 10 Receiver unit R 318 PCB layout ...
Page 34: ...Page 34 41 APPENDIX 11 LM 3188 Wiring ...
Page 35: ...Page 35 41 APPENDIX 12 LM 3188 Wiring universal power option ...
Page 36: ...Page 36 41 APPENDIX 13 Monitor Unit test points and jumpers ...
Page 37: ...Page 37 41 APPENDIX 14 Monitor Unit Options ...
Page 38: ...Page 38 41 APPENDIX 15 Installation examples ...
Page 41: ...Page 41 41 APPENDIX 18 Mating flange adapters ...
