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QUICK CALCULATOR / VISUAL ENGINEERING

Projection & contrast

Evaluate throw distance and screen luminance with explicit ambient-light and projector assumptions.

Open room workspace

Save, load & project settings

Project nameLength entry units

Engineering inputs

Start here: Minimum throw distance

* Required for this basic result. Optional fields add other results. Only enter known values.

What else may be needed?

Maximum throw ratio adds the other end of the throw range. Brightness additionally needs image height, effective lumens, screen gain and model confirmation. Contrast also needs ambient screen data and comparable effective contrast.

Still to enter: Image width; Minimum throw ratio.

Image width (m)Image height (m) (optional)Minimum throw ratioMaximum throw ratio (optional)Screen gain at viewing direction (optional)Effective screen-incident flux (lm) (optional)Diffuse-screen model (optional)Use only for suitable screens. Flux must include verified mode and optical losses.Measured ambient screen luminance (cd/m²) (optional)Screen incident illuminance (lux) (optional)Ambient effective reflectance (optional)Comparable effective white/black contrast (:1) (optional)Target image-system contrast (:1) (optional)Illustrative workplane lighting (optional)Workplane values are not screen illuminance and never feed the contrast calculation.Custom workplane illuminance (lux) (optional)

Source and measurement conditions (optional)

Simulation

REV 0

Quick calculator

Independent calculations with only the inputs they need. Use the room workspace for seats, obstructions and synchronized views.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Method & limitations

Throw geometry and a simplified diffuse-screen photometric model. Not an AVIXA contrast measurement certificate.

View reference register

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Rack front elevation

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

Frequency-dependent RT60

Calculation geometry

Enter the required geometry or measurements to draw this calculation. No sample dimensions are assumed.

TAKE YOUR THINKING FURTHER

A report you can discuss.

Inputs, calculation basis, diagrams and limitations — kept together in a local PDF.

Report page size

Combined project report

Includes results and inputs for selected tools, plus available diagrams for those tools and the current room view. All values use the same project revision.

Calculation results

Preliminary engineering. Review the basis before using a value.

Image area

Additional Input Required

— m²

Screen width × height.

Minimum throw distance

Additional Input Required

— m

Measured from the manufacturer lens datum.

Maximum throw distance

Additional Input Required

— m

No chassis-offset assumption; UST needs the model installation table.

Projected white luminance

Additional Input Required

— cd/m²

Effective lumens must already include known mode/lens losses. Gain applies at the viewing direction.

Ambient screen luminance

Additional Input Required

— cd/m²

Screen incident lux × ambient reflectance / π. Workplane presets are not screen lux.

Estimated image-system contrast

Additional Input Required

— :1

Requires comparable effective contrast, not a marketing dynamic contrast value.

Required effective lumens

Additional Input Required

— lm

Requires positive ambient luminance and native contrast above target. Zero ambient requires a separate brightness target.

Lens shift / UST installation verification

Engineering Verification Required

—

Use the model-specific installation drawing, joint shift limits and housing/ceiling clearances. Generic throw geometry alone cannot establish installation feasibility.