Screen Gain Calculator — Brightness & Foot-Lamberts from Gain Ratio | TheaterOwl

Calculating Screen Gain is a fundamental and crucial step in home theater design. It is not just about measuring distance; it must be designed based on scientific evidence to maximize human visual perception limits and immersion. Incorrect settings can cause eye strain or fail to take advantage of resolution benefits. This tool complies with industry standards such as THX and SMPTE guides to provide the most precise data.

Cách thức hoạt động

This system utilizes complex trigonometry and optical formulas. Based on the input variables (screen size, resolution, viewing angle, etc.), it simultaneously calculates the minimum distance where pixels do not appear clustered and the maximum immersion distance that fills the entire field of view. All results are reflected in real-time, suggesting figures optimized for the user's environment.

Kịch bản sử dụng

• When simulating the installation space before purchasing new Screen Gain equipment
• When wanting to optimize the performance of an existing home theater system and achieve professional-level tuning
• When needing to find a compromise for the best audiovisual experience within space constraints

Cách sử dụng máy tính độ khuếch đại màn chiếu

Nhập kích thước màn chiếu, tỷ lệ gain và ANSI lumen của máy chiếu để tính độ sáng theo foot-lambert.

THX khuyến nghị 12–22 foot-lambert. Mục tiêu ISF SDR là 16 fL. Trắng mờ chuẩn = gain 1.0, xám 0.8–1.0, high-gain 1.3–2.5.

Gain cao hơn giúp tăng độ sáng nhưng làm hẹp góc nhìn. Với rạp tại gia, nên dùng gain 1.0–1.3.