Demonstrating a multi-primary high dynamic range display system for vision experiments
TLDR
The MPHDR display is the first system to the authors' knowledge to allow for spatially controllable, high dynamic range stimulus generation using multiple primaries, and it is demonstrated the high luminance, highynamic range, and wide color gamut output of the MPHDR displays.Abstract:
We describe the design, construction, calibration, and characterization of a multi-primary high dynamic range (MPHDR) display system for use in vision research. The MPHDR display is the first system to our knowledge to allowfor spatially controllable, high dynamic range stimulus generation using multiple primaries.We demonstrate the high luminance, high dynamic range, and wide color gamut output of the MPHDR display. During characterization, the MPHDR display achieved a maximum luminance of 3200 cd=m2, a maximum contrast range of 3; 240; 000 V 1, and an expanded color gamut tailored to dedicated vision research tasks that spans beyond traditional sRGB displays. We discuss how the MPHDR display could be optimized for psychophysical experiments with photoreceptor isolating stimuli achieved through the method of silent substitution. We present an example case of a range of metameric pairs of melanopsin isolating stimuli across different luminance levels, from an available melanopsin contrast of117%at 75 cd=m2 to a melanopsin contrast of23%at 2000 cd=m2.read more
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Journal ArticleDOI
A Review of Silent Substitution Devices for Melanopsin Stimulation in Humans
Vincent Conus,Martial Geiser +1 more
TL;DR: Melanopsin photoreceptors (ipRGC), highlighted in the early 2000s, are intimately linked to the circadian rhythm and therefore to the authors' sleep and wakefulness, and it is believed that the study of ipRGC responses is important.
Journal ArticleDOI
Optimising metameric spectra for integrative lighting to modulate the circadian system without affecting visual appearance.
Babak Zandi,Oliver Stefani,Alexander G. Herzog,Luc J. M. Schlangen,Quang Vinh Trinh,Tran Quoc Khanh +5 more
TL;DR: In this paper, a 6-, 8- and 11-channel LED luminaire with fixed illuminance of 250lx was used to systematically investigate the metameric tuning range in melanopic equivalent daylight illuminances (EDI) and melanopic daylight efficacy ratio (melanopic DER) for 561 chromaticity coordinates as optimisation targets (2700-K to 7443-K) while applying color fidelity index Rf criteria from the TM-30-20 Annex E recommendations (i.e. Rf,h1 $$\ge
Journal ArticleDOI
Maximum possible contrast level for silent substitution: a theoretical model applied to melanopsin stimulation.
TL;DR: It is shown that, for contrast optimization, only as many light sources as photoreceptors do matter and that, in the case of four light sources, the maximum contrast achievable for melanopsin lies at the intersection of the lines joining the sources in the CIE xy chromaticity diagram.
Journal ArticleDOI
Protocol for isolation of melanopsin and rhodopsin in the human eye using silent substitution
Thomas W. Nugent,Drew Davis Carter,Samir Uprety,Prakash Adhikari,Beatrix Feigl,Andrew J. Zele +5 more
TL;DR: In this article , the authors describe the physical light calibrations of the display instrumentation, control of stimulus artefacts, and correction of individual between-eye differences in human observers, achieving complete photoreceptor silent substitution in psychophysical, pupillometry, and electroretinographic experiments for probing melanopsin, rod and cone function.
Book ChapterDOI
Optical stimulation systems for studying human vision.
TL;DR: In this article , the most common setups that scientists use for generating light stimulation, from lab-made approaches to commercially available technologies, are described, and a set of characterization and calibration principles that researchers should consider when carrying out experiments with the described optical stimulators are discussed.
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