功能

• You can use an ND filter that varies the optical density at equal intervals to cycle through the transmitted light levels.
• Can be used for calibration of densitometers and colorimeters.
• Because 11 levels of evenly spaced optical density are arranged on a sheet of glass, a visual comparison can provide an approximate optical density value for an unknown optical density sample.
• Since it is chrome coated, it can also be used to adjust the amount of light of the laser beam.
• Since it is chrome coated, the optical density does not change even if the wavelength changes in the visible light range.
• * The uniform transmittance range is 4.6×25 mm.
• * Use with a beam of φ3mm or less.
• * Transmittance varies logarithmically with the amount of movement.
• * This is not a proportional relationship.
• * Cannot be used for high energy pulsed laser.