Barco G50, Installation Manual

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53 R5916677 /00 G50
5.3 Boresight (Scheimpflug) adjustment
What is Boresight (Scheimpflug)
The lens holder has to be adjusted so that the “sharp focus plane” of the projected image falls together with
the plane of the screen (Fp1→Fp2). This is achieved by changing the distance between the DMD plane and
the lens plane (Lp1→Lp2). The closer the lens plane comes to the DMD plane the further the sharp focus
plane will be. It can occur that you won't be able to get a complete focused image on the screen due to a tilt (or
swing) of the lens plane with respect to the DMD plane. This is also known as Scheimpflug's law. To solve this
the lens plane must be placed parallel with the DMD plane. This can be achieved by turning the lens holder to
remove the tilt (or swing) between lens plane and DMD plane (Lp3→Lp4).
SCREEN
DMD
Lp1
Lp2
Fp1
Fp2
SCREEN
DMD
Lp3
Lp4
Fp3
Fp4
(Scheimpflug)
Image 5–5 Boresight (Scheimpflug) principle
Required tools
• Allen wrench 4 mm
• Boresight extenders
• Boresight L shape socket tool
Preparations
1. Choose the test pattern of the OSD. Switch to full screen mode.
2. Prepare the test area. Verify that the throw ratio of the installed lens matches the requirements of the
installation area (projection distance and screen size).
3. Check that the lens is correctly installed.
4. Zoom the lens to its widest opening (maximum image size on the screen).
5. Adjust the focus control to search for the best sharpness of the projected image
6. Is this a lens with an floating ring? E.g., G lens (0.65 - 0.75 : 1) 3 .
► If yes, adjust the floating ring of the lens (see next chapter).
Adjust floating ring G lens (0.65 - 0.75 : 1) 3
2 1
1
2
Image 5–6
Adjusting the projected image
3. Also applicable for the GC lens and GC+ lens in case these lenses are supported on this projector model.