Narrowband interference filter
- maker:
- Barr and Stroud Limited
Narrowband interference filter, one of five, type MD4 (peaks at the wavelengths 436, 546, 626, 672, and 766 n.m.), by Barr Barr and Stroud Ltd., Glasgow, Scotland, 1973.
Narrowband interference filter, one of five, type MD4 (peaks at the wavelengths 436, 546, 626, 672, and 766 n.m.), by Barr Barr and Stroud Ltd., Glasgow, Scotland, 1973.
