功能

• This half mirror can be used in a wide wavelength range from visible to infrared.
• Since it is a plate type, it does not become heavy like a cube even if the effective diameter is increased.
• It can also be used as a half mirror to match an illumination system such as a coaxial epi-illumination observation system with an observation optical system.
• The wavelength characteristics are flat over a wide wavelength range, and the transmitted and reflected light can be divided into the same ratio even if the wavelength changes.
• We have a lineup for visible and infrared light (semiconductor laser).
• Since it is a plate type and has an anti-reflection coat on the back, it does not cause ghosting (stray light) due to illumination in epi-illumination.
• There are two types: a parallel plane type, in which the beam does not refract, and a wedge type, in which ghosts and interference due to backside reflections are less affected.
• The wedge type has an arrow pointing toward the surface at the thickest point.
• * The chromium film absorbs about 40% of the light, and the transmitted or reflected light is 30% of the incident light amount.
• * Reflectance and reflectance wavelength characteristics are greatly affected by the absorption film when light is introduced from the back side.
• * When linearly polarized light such as laser light is used, the reflectivity and transmittance vary depending on the polarization direction.
• * When adjusting the branching ratio to 1:1, tilt the polarization azimuth to 45 degrees or use circularly polarized light.
• * The phase difference of the incident light is not stored in transmitted light or reflected light.
• * Use a wave plate to compensate for the phase difference.
• * Due to the effect of the refractive index and thickness of the substrate, the optical path of the transmitted light is translated by several millimeters relative to the incident light. (In the case of the wedge type, the beam polarization angle of about 30 minutes is added to the optical path translation.) * * Transmittance wavelength characteristics may change when used at an incident angle other than 45 degrees.