WELCOME TO ANTLIA FILTER

Antlia Narrowband Filters Spectral Measurement

151
发表时间:2022-03-19 15:33

Each Antlia Narrowband Filter has been scanned by following spectral measurement.

Parameters setting involved in scan accuracy by Agilent Cary series spectrophotometer

Data interval (数据间隔): 0.1nm

QQ图片20220310202109.png

Resolution/slit width (狭缝):0.2nm

QQ图片20220310202149.png

The slit is an entrance that controls how much light enters the spectrometer. The width of the slit affects resolution; the narrower the slit, the higher the resolution. We set the slit to 0.2nm,it means scan data we get is an average number within every 0.2nm. For a narrow band of 3nm, the result is closest to the real performance of the filter. If we set slit to 1nm or 3nm for a FWHM 3nm narrowband filter, the resolution is worse, scan result will deviate seriously from the truth.

Scan result of H-alpha Pro filter T% @656.3nm 92%

QQ图片20220310202407.png

Firstly, we ensure that the transmittance at 656.3nm is greater than 88%, secondly, all narrowband filters shift its bandwidth to shorter wavelengths with faster optics, for those filter leaning to left, they will have better performance when imaging deep sky objects as the high transmittance of them was kept. The products are more workable for most optics telescopes in market.


If we use a less precise spectrophotometer or parameters to scan, we get result as below

Data interval (数据间隔): 0.1nm

QQ图片20220310202109.png

Resolution/slit width (狭缝):2.0nm

QQ图片20220310202347.png


Scan result of H-alpha Pro filter T% @656.3nm 82%

QQ图片20220310202401.png




分享到:
Support
support@antliafilter.com

Sales
sales@antliafilter.com

旧版模块不支持支付功能,请联系管理员
Name:
*
E-mail:
*
Country:
*
Message:
*
验证码
 换一张
*
提交留言
Message :