Ricoh Altair-PJ2 Series, Technical Training Manual

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This is a general description. The Altair-PJ1 does not look exactly like this.
See later in this presentation for the components of the Altair-PJ1.
Lamp: Light source
UV-IR Filter: Lets visible light through (wavelengths between 380~780nm)
and prevents UV and IR damage to other optical parts.
CW (Color wheel): The wheel has a red segment, a green segment, and a
blue segment. The wheel rotates to provide red, green, and blue light (the
color of the output beam changes from red, to green to blue)
Integrating Rod: Gives the light a uniform luminous flux.
L3: Condensing lens. Condenses divergent light.
L2: Condensing lens. Works with L3 to condense divergent light.
M1: Mirror 1. Changes the light direction.
M2: Mirror 2. Changes the light direction.
Relay L1: Condenses and magnifies divergent light before it goes to the
DMD.
DMD Chip: Contains micro mirrors to generate the image
Projection Lens (WT41 in the diagram): Projects the image onto the screen.