기능

• □ This bandpass filter can be used with a large effective diameter of 45 mm or more.
• Use this when you want the sample to collect the thick collimated light from a bandpass filter, or when you want to collimate the light that emanates from a single point and pass it through a bandpass filter with a larger effective diameter.
• The dielectric film provides a sharp rise and reliable shielding of the cutoff wavelength region.
• Available in 10 nm increments with a half-width of 10 nm to 12 nm and a center wavelength of 400 nm to 900 nm, it is possible to obtain the required wavelength in the entire wavelength range.
• All the sides are painted black to suppress the influence of scattered light from the glass sides.
• A φ25 mm size interference filter (VPF-25 C) and a high transmittance interference filter (YIF) are available.
• * The heat-resistant temperature of this interference filter is 80 degrees or less. Do not use this filter near a lamp or in areas subject to high temperatures.
• * This interference filter cannot be used for high-power laser or high-energy pulse laser.
• * The interference filter is incident angle dependent. When the angle is tilted to the optical axis, the center wavelength moves to the short wavelength side, and the transmittance also decreases.
• * Enter a parallel beam or a light close to the parallel beam at 0° to the optical axis.
• * The narrower the half-width, the greater the angular dependency.
• * When the temperature of the interference filter rises, the center wavelength moves to the longer wavelength side.
• * Each filter has been precisely adjusted to achieve high performance.
• * For this reason, the filter thickness varies one by one.