Ricoh PJ LW3000ST, Field Service Manual

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Light Source/
Light Collection
Method
image Characteristic
2. Laser / LED
Hybrid
• Instant on
• Long lifetime
• Maintenance free
• Brightsync and very high color
rates
• LED Etendue* will limit brightness
2000-3500L
3. Laser +
Phosphor
• Instant on
• Long lifetime
• Scalability from low to high
brightness
• Higher efficiency
• Smaller Etendue*
• Maintenance-free
4. Pure Laser
• Instant on
• Long lifetime
• Maintenance free
• Smallest Etendue*
• Smaller optics
• High laser costs
* This is the amount of light collected into the display device (such as a DMD or LCD). The smaller the
value is, the smaller size you can achieve.
Optical Mechanism
The blue laser light from the laser diode passes through the afocal lens*[A] and the blue dichroic mirror
[B]. Using the collimator [E], the laser irradiation position on the phosphor wheel is adjusted for
convergence.
The phosphor wheel [D] creates green and yellow lights from the blue light. The green and yellow lights
reflected by the blue dichroic mirror [B].
7. Detailed Description
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