As an example of 100 inches, since there is an optical zoom of 1.1, the projection distance is 3.08 to 3.32 meters.
The projector is fixed at 3.08 meters:
When the optical zoom is 1, the projection ratio is 1.5, and the projection screen size is 92.6 inches.
When the optical zoom is 1.1, the projection ratio is 1.39, and the projection screen size is 100 inches.
Calculation formula:
Frame width (m) x Projection ratio = Projection distance (m)
Projection ratio = projection distance/screen width, ie D/W in the figure below
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Calculated according to the cinema's best viewing angle of 60 degrees, the optimal seat distance = the screen width x 0.866
Taking a 100 inch 16:9 screen as an example, the best seat distance = screen width 2.21 meters x 0.866 = 1.91 meters
Conversion formula for the length unit: 1 inch = 2.54 cm = 0.0254 meters The ratio of the width and height of the normal screen is 16:9, and is obtained from the Pythagorean theorem:
Screen width (m) = screen size (inch) x 0.0254 m/inch x 0.87159
Screen height (m) = screen size (inch) x 0.0254 m/inch x 0.49016
Polar meter H1 projection size cheat sheet:
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