61-6879-71 Reflective Neutral Density Filter (Visible) φ15mm Transmittance 0.1% FND-15C02-0.1
Analyzer, Testing Equipment

61-6879-71 Reflective Neutral Density Filter (Visible) φ15mm Transmittance 0.1% FND-15C02-0.1

model: 61-6879-71
brand: SIGMAKOKI CO., LTD.

Product Description

Product Model: 61-6879-71Product Brand: SIGMAKOKI CO., […]

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Product Details

Product Model: 61-6879-71
Product Brand: SIGMAKOKI CO., LTD.

Features

  • This is an ND filter ***d for high-power lasers and for dimming light in a wide wavelength range.
  • Light that does not transmit is not absorbed by the glass, so there is no need to worry about the glass getting hot and breaking.
  • Since it is reflected by a metal film, it shows very gentle transmittance wavelength characteristics from ultraviolet to infrared.
  • The thickness of the glass is 2 mm±0.1 mm and is constant regardless of the transmittance.
  • * Since chromium film has absorption, it cannot be ***d for high-energy pulsed laser.
  • * When a high-power laser is injected into the filter, the beam may focus due to the thermal lens effect.
  • * Use a variable beam splitter (VBS) for high power lasers and high energy lasers.
  • * The laser beam reflected by the surface of the filter is dangerous.
  • * Terminate the reflected beam so as not to irradiate the worker.
  • * When the laser beam enters the filter normally, the light reflected by the filter returns to the laser light source.
  • * When there is such a return light, the laser oscillation becomes unstable.
  • * To prevent the return light from returning to the laser source, tilt the filter slightly.
  • * The 92% transmittance filter (FND-92, MFND-92) is a flat board with no coat on both sides.
  • * If the reflectivity of the no-coat surface is 4% (8% on both sides), the transmittance becomes about 92%.

Spec

  • [

    common specification]
  • Type: for visible light
  • Material: BK7
  • Coating: Chromium (Cr), However, FND-92, MFND-92 is no coat
  • Adaptive wavelength: 400 - 700nm
  • Parallelism: <1′
  • Surface accuracy: λ (measurement range φ30mm)
  • Scratch - dig: 60-40
  • Effective diameter: 90% of the outer diameter
  • [Individual specification]
  • Outer diameter φD: φ15mm
  • Transmittance (550nm): 0.1%
  • RoHS conform product

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