Bandpass filters and neutral density filters
were used to control the wavelength ranges and UV irradiance levels, respectively.
An identical holder was used to hold the neutral density filters
, which have varying transmittance values and are used to control the UV irradiance incident on the specimens.
At the same time, the selected lens as well as neutral density filters
or spectral filters are also taken into account.
Bartley points out that chips in digital cameras are so light-sensitive that one has to add neutral density filters
or reduce the aperture.
Research Vision thematic articles: neutral density filters
There was a wide range of CET-accredited practical workshops available to delegates, ranging from Advanced retinoscopy and Advanced optic disc assessment in glaucoma to Binocular balancing using micro-prisms and Neutral density filters
, all of which were presented by knowledgeable professionals sharing a wide range of experiences to attendees.
The instrument can be temperature calibrated up to 300 C, or up to 3000 C with spectral and/ or neutral density filters
. Measurement accuracy of +/-1 C for standard configurations ensures high-quality results.