PSMH50C0810W-308/355

[Features]
· It is a half mirror for ultraviolet lasers and YAG lasers.
· Available in an extensive lineup of wavelengths from vacuum ultraviolet to infrared.
· Dielectric multilayer film is coated on the front and antireflection film on the back to minimize loss of light.
· 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.
· 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.
· Ultra-broadband, broadband, and cube type are also available separately.
· 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 CaF 2
· Substrate Surface Accuracy: λ/10 (PSMH-157 is optically polished)
· Coating: Front Surface Dielectric Multilayer Film, Rear Surface Anti-Reflective Film
· Incidence Angle: 45°
· Branching Ratio (Reflection: Transparency): 1:1
· Scratch-Dig: 10-5 (PSMH-157 is 40-20)
· Effective Diameter: 90% of External Diameter
· [Individual Specifications]
· Compatible Wavelength: 308 to 355 nm
· Outer diameter φD: φ50 mm
· Thickness t: 8 mm
· Material: Synthetic Quartz
· Parallelism, Wedge Angle W: 1° ±5'
· Reflectance R Transmittance T: T = 50 ±5% on Average
· Laser Yield Strength*: 2 J/cm2
· * Laser Pulse Width 10 ns, Repetition Frequency 20 Hz