ToolHuts

Praktische tools voor nauwkeurig werk

Projector Projectieafstand & Throw Ratio Calculator

Bereken de afstand van lens tot scherm, de throw ratio of de schermdiagonaal met een schaalgetrouw optisch diagram.

in
in
Throw 125.5 in
Throw distance125.5in
Throw ratio1.200
Screen diagonal120.0in
Image width104.6in
Optical classstandard throw

Werking

How to use it: choose the unknown, then enter screen aspect ratio and the other two optical values. Throw distance is measured from the projector lens to the screen plane.

Formula. Throw ratio = lens-to-screen distance / image width. Screen width is derived from diagonal and aspect ratio.

Example. A 120-inch 16:9 screen is about 104.6 inches wide. At 1.20 throw ratio the lens sits about 125.5 inches from the screen.

Voorbeeld met huidige invoer

Het resultaat hierboven gebruikt precies deze waarden. Deze momentopname wordt bij het afdrukken opgenomen om de uitvoer met de oorspronkelijke metingen te controleren.

Solve for
Throw distance
Screen diagonal
120 in
Lens-to-screen distance
144 in
Throw ratio
1.2
Aspect width
16
Aspect height
9

Hoofdresultaat: Throw distance: 125.5 in.

Vóór gebruik van het resultaat

  • Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
  • Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
  • When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.

Beperkingen

This is neutral first-order optics. Real projectors have model-specific zoom ranges, lens shift, offsets, focus limits and chassis clearances. Confirm the result inside the chosen projector's official installation manual before mounting.

Veelgestelde vragen

Why measure from the lens?

Throw ratio describes the optical path from lens to image plane, not distance from the projector's rear panel.