calculating projected image widths based on DL1 distance from surface being projected onto

reaganreagan Registered User, HES Alumni
edited October 2004 in DL.3/DL.2
If you need to calculate the width of the projected image from a DL1, based on a requirement to place the light 8 meters from the screen or surface, for example, you can use the following calculations that will provide a range of widths based on the DL1 zoom capabilities.

If you require a non-metric distance value, convert 8 meters into feet since the throw ratio values for DL1 are represented in feet (1.8 - 2.4 to 1) i.e. a one foot image at 1.8 feet projection distance for the wide zoom.

8 meters = 26.24 feet (formula used 8/.3048)

26.24/1.8 = 14.6 ' horizontal (14.6*.3048 = 4.45m)
26.24/2.4 = 11 ' horizontal (11*.3048 = 3.35m)

So the range of horizontal projected image widths is approximately 3.35 to 4.45m if the projecter is 8m from the surface being projected onto.

Comments

  • reaganreagan Registered User, HES Alumni
    edited October 2004
    Click here to access the DL1 Distance / Image Size Chart.
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