brdoptical

Based on the technique of all-dielectric hard coating and the principle of dielectric interference, and based on the characteristics of narrow-band optical pass filters, the optical properties are independent of the substrate. The narrow band bandpass filter produced by Ecoptik (also known as BRD Optical) is more convenient to be built into the instrument imaging system so that its optical performance can be improved and effectively applied. The special optical material substrate is used to solve the problem that the absorption type synthetic glass is easy to mold and the optical performance is unstable. The narrow-band optical pass filters are produced according to the customer's index requirements. Description Of Narrow Band O ptical Filter   Bandwidth refers to the distance between two positions in the passband whose transmittance is half of the peak transmittanceThe above six parameters must be taken into account in the use and selection of narrow-band filters. Different perfor

 Ecoptik (also known as BRD Optical) provides meniscus lens in both positive and negative focal lengths. These china concave meniscus lens are useful when used with another lenses to increase or decrease the focal length. This meniscus lens element configuration does not introduce any additional coma or spherical aberrations Description Of Positive/Negative Meniscus Lens Ecoptik (also known as BRD Optical) provides meniscus lens in both positive and negative meniscus lengths. On the aspect of shape, it can be divided into convex and concave meniscus lens. On the aspect of the effect, it can be divided into diverging and converging meniscus lens. Specifications Of Positive/Negative Meniscus Lens   Material Optical glass/ Fused silica/ sapphire etc. Diameter 2mm~300mm Diameter   tolerance ±0.05mm(≤50mm) ±0.1mm( ＞ 50mm) Focal   length -50mm~-2000mm Focal   length tolerance ±0.2% （＜ 10mm ） ±0.5% （＜ 10mm-1000mm ） ±1% （＜＞ 1000mm ） Center   Thickness 2mm~20mm Surface   quality 60/40 ， 40/20 ，