530nm 대역 통과 필터

Context: This patent describes a multi-band interference coating (marketed as SpectraPLUS™) designed for color imaging systems like video cameras, digital projectors, and film.

Usage of Filter: The 530nm bandpass filter is used as the primary green transmission channel in a triple-bandpass structure (transmitting at 450nm, 530nm, and 650nm).

Function: It selectively transmits the "pure" green portion of the spectrum while blocking the "crossover" wavelengths (around 490nm and 590nm) where the human eye's response to red, green, and blue overlaps and causes color confusion.

Result: The system achieves significantly enhanced color saturation, purity, and signal-to-noise ratio by eliminating the "muddy" spectral regions between the primary colors.

Context: This patent relates to optical filters used in viewing systems, likely for military or high-performance observational contexts (assigned to Litton Systems).

Usage of Filter: A 530nm bandpass component is used as the middle transmission band in a filter that also passes 450nm (blue) and 610nm (red).

Function: The filter is tuned to match the peak sensitivity of the human eye (photopic response) while providing distinct color separation. The 530nm band specifically captures the peak brightness sensitivity of the eye.

Result: The user achieves improved visual clarity and color discrimination in difficult lighting conditions, maintaining natural color perception while blocking interfering wavelengths.

Context: This patent (assigned to Panavision) describes a high-end lens system for digital cinematography that incorporates specific color-correcting optics.

Usage of Filter: The 530nm bandpass filter (citing the technology from US5646781A) is used as an internal spectral correction element within the camera lens assembly.

Function: It shapes the spectral input reaching the camera sensor to match the "ideal" color gamut, specifically isolating the green channel at 530nm to prevent spectral crosstalk from cyan or yellow light sources.

Result: The lens delivers cinematic color reproduction that mimics high-quality film stock, with sharper contrast and reduced chromatic aberration.