[Analysis of spectral properties of novel holographic transmission notch filter].
Optical filter has extremely important applications in spectroscopy, optical measurement and laser physics. Holographic filter, especially the transmission volume holographic notch filters using dichromate gelatin (DCG), is a new kind of filter with the main characteristic of a very narrow bandwidth. In this paper, measurements were carried out on the spectral properties of this transmission volume holographic notch DCG filter using an ultraviolet-visible transmittance spectrometer. The experimental results show that the relative transmittance of main spectrum of this filter is less than 2% in the visible region between 400 and 800 nm, and the relative transmittance of other spectra are more than 85%. Moreover, the filter has a narrow bandwidth with a half-bandwidth less than 12 nm, and a 1/10 width of the bandwidth less than 15 nm. These results indicate that this new kind of filter has an excellent filter characteristic to the main spectrum of Ar+ laser at the wavelength of 514.5 nm.
Huang
Chong
C
Department of Physics, Shantou University, Shantou, China.
Ouyang
Yan-dong
YD
Wu
Jian-hong
JH
Yu
Yun-peng
YP
Lin
Shun-hui
SH
D006696:Holography / Q000295:instrumentation*; D007089:Image Enhancement / Q000295:instrumentation; D055096:Optical Devices; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation / Q000379:methods; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods