PMH-50C05-10-4/20 Mirror

[Features]
· It is a plate type half mirror that can be used in wide ultraviolet, visible, and infrared wavelength bands.
· It can be used for multi-wavelength lasers and transmission/reflection branching of white light sources.
· Ultra-wide band half mirrors can also be used as the element for spectroscopic measurements.
· The ultra-broadband type (PMH) has a wide band which can cover ultraviolet and infrared rays, and the lineup presents 4 types of half mirrors whose band wavelengths are changed.
· 3 types of half mirrors for wide band use (PSMH) are available; for visible, near infrared, and communication infrared rays.
· Because a dielectric multilayer is used, there is almost no light loss caused by film absorbency, so it branches light effectively.
· Because its polarization properties are low, light can be branched even when using a laser light source or a linearly polarized light source.
· As it is a plate type, it is possible to minimize wavelength dispersion and chromatic aberration induced when transmitting through the substrate and also reduce the weight.
· There are 2 types: a parallel plane type in which the beam does not refract and a wedge type with little influence from ghosting or interference from back side reflections.
· Wedge type has an arrow mark pointing towards front surface at the thickest part.
· * When linearly polarized light such as laser light is used, reflectance and transmittance change depending on the polarization direction.
· * When adjusting the branching ratio precisely to 1:1, ensure the direction of polarization is set to 45 degrees or use circular polarization of light.
· * Optical path of the transmitted light may be shifted a few millimeters parallel from the incident light, depending on the refractive index and thickness of the substrate. (A beam amplitude of approximately 30 minutes is added to parallel displacement of the optical path for the wedge type)
· * Transmittance wavelength characteristics will change when used with an incident angle other than 45°.
· * If you have difficulty distinguishing the reflective coating surface, check the arrow on the side of the substrate.
· * Phase differences of incident light are not preserved in reflected light and transmitted light.
· * Use a wave plate for phase difference compensation.
[Product Specifications]
· [ Common Specifications]
· Material: BK7 Synthetic Quartz
· Substrate Surface Accuracy: λ/10
· Coating: Front Surface Dielectric Multilayer Film, Rear Surface Anti-Reflective Film
· Incidence Angle: 45°
· Branching Ratio (Reflection: Transparency): 1:1
· Scratch-Dig: 10-5
· Effective Diameter: 90% of External Diameter
· [Individual Specifications]
· Compatible Wavelength: 400 to 2,000 nm
· Outer diameter φD: φ50 mm
· Thickness t: 5 mm
· Material: BK7
· Parallelism: < 5″
· Transmittance (Average Value of P and S Polarized Light): Average Value 50 ±10%
· Laser Yield Strength*: 0.5 J/cm2
· * Laser Pulse Width 10 ns, Repetition Frequency 20 Hz