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Originally Posted by

**-bart-**
The magnification of a lens-(or pism) pair is slightly wavelength dependent.

When different colors share the same telescope, that could pose an issue if you're very picky about beam matching.

Oh yes.... the uncorrected divergence of the 07E is greater than the

uncorrected divergence of the 01T.

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I assume that the size of the emitter is the variable in play here. The

question stands, if we lengthen the path of propagation for the 07E... will

this compensate enough to equalize the divergence between the two diodes at the Far field ??

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To forge an equal far-field divergence circles back to being dependent on

how far the beam target is from the projector unit.

This issue then reverts back to the discussion of how far away is the

typical far-field maximum?

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SOooo, what does the venue demand ?...15 meters, 20 meters, 30 meters...to the Far field. How good the beam matching is... depends on how far away the beam target is.

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There also remains another problem of collateral consequence. When we extend the beam path of the 07E, this will also increase the width/geometry at the near field. Will the near field then fit the scanner mirrors ?? Always compromises !

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It boils down to...What can we live with ? Perhaps, a single set of cylindrical lenses will not be adequate under some cases....vis... Graphic shows at a 30 meter Far field ??

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Optics are a stern taskmaster, and one never gets without giving.

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I have no doubt that the commercial projector manufactures grapple with this every day....and have do so for years...just like we have.

Last edited by CDBEAM; 01-20-2016 at 09:54.
Reason: Cleaned up the post

Beam Axiom #1 ~The Quantum well is DEEP ! Photons for ALL !!

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Beam Axiom #2 ~Yes...As a matter of fact...I DO wear tinfoil on my head !!

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Beam Axiom #3 ~Whe'n dout...Po ah Donk awn et !!

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Beam Axiom #4 ~A Chicken in every Pot, and a Laser Lumia in every Livingroom !!

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Beam Axiom #5 ~"Abstract Photonic Expressionism"....is "Abstractonimical" !!

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Beam Axiom #6 ~ "A Posse ad Essea" ~ From being possible to being actual ...is the beam target !