Spectral Transmittance and Spectral Reflectance Data R package photobiologyFilters version 0.6.1 Spectral 'transmittance' data for frequently used filters and similar materials. Plastic sheets and films; photography filters; theatrical gels; machine-vision filters; various types of window glass; optical glass and some laboratory plastics and glassware. Spectral reflectance data for frequently encountered materials. Part of the 'r4photobiology' suite, Aphalo P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>. Software Depends: R (>= 4.1.0), photobiology (>= 0.13.2) Suggests: knitr (>= 1.50), rmarkdown (>= 2.29), ggplot2 (>= 3.5.0), ggspectra (>= 0.3.16), photobiologyWavebands (>= 0.5.4) Pedro J. Aphalo <pedro.aphalo@helsinki.fi> Comprehensive R Archive Network (CRAN) Pedro J. Aphalo [aut, cre] (ORCID: <https://orcid.org/0000-0003-3385-972X>), Titta K. Kotilainen [ctb] (Contributed data), T. Matthew Robson [ctb] (Contributed data), Ricardo Hernández [ctb] (Contributed data), Tania de la Rosa [ctb] (Contributed data), Riitta Tegelberg [ctb] (Contributed data), Andreas Albert [ctb] (Contributed data), SCHOTT AG [ctb] (Contributed data), Midwest Optical Systems, Inc. (MidOpt) [ctb] (Contributed data) GPL (>= 2) 2025-09-24 application/tgz https://CRAN.R-project.org/package=photobiologyFilters doi:10.32614/CRAN.package.photobiologyFilters