Pupillary Size Differences under Incandescent and High Pressure Sodium Lamps

Berman, S.M.; Jewett, Don L.; Bingham, Laura; Nahass, R.; Perry, Franklin; Fein, George

doi:10.1080/00994480.1987.10748662

Cited by 16 publications

(6 citation statements)

References 13 publications

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“…Specifically, we intend to use the brightness matching paradigm developed in this experiment to evaluate the energy efficiency consequences of scotopic sensitivity. Berman and his colleagues have recently proposed that replacing standard cool white lamps with so-called scotopically enriched' narrow band light sources could significantly reduce lighting energy consumption (26)(27)(28) .Scotopically enriched sources are judged as brighter, and result in smaller pupils, than other sources matched for illuminance, but less rich in 'scotopic lumens'. However, knowing that one lamp source was judged as brighter than another gives no information on the magnitude of the effect, which can be evaluated in a brightness matching experiment like the one we reported here.…”

Section: Discussionmentioning

confidence: 99%

Perceived room brightness: Pilot study on the effect of luminance distribution

Tiller

Veitch

1995

Lighting Research and Technology

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1177/14771535950270020401Lighting Research & Technology, 27, 2, pp. 93-101, 1995 Perceived room brightness: pilot study on the effect of luminance distribution Tiller, D. K.; Veitch, J. A. Perceived room brightness: Pilot study on the effect of luminance distribution D K Tiller DPhil and J A Veitch PhDInstitute for Research in Construction National Research Council of Canada Ottawa, Ontario K1A OR6A version of this paper was published in Lighting Research & Technology, Vol. 27, No. 2, 1995, pp. 93 -101 Summary This paper describes an experiment to investigate the influence of luminance distribution on perceived brightness in interiors. Thirty subjects matched the brightness of mock offices using a dimmer. Two of the four mock offices used in the experiment had relatively uniform luminance distributions, created by ceiling fluorescent lighting equipped with K-12 acrylic lenses. The other two offices had a nonuniform luminance distribution created by substituting parabolic louvres for the acrylic lenses. In control comparisons subjects matched two rooms having the same luminance distribution. In experimental comparisons subjects matched two rooms having different luminance distributions. The rooms with the nonuniform luminance distribution required between five and ten percent less working plane illuminance to match the brightness of the rooms with the uniform luminance distribution. This raises the possibility of modest energy savings through lighting design. RésuméCe document décrit une expérience visant à étudier l'influence de la répartition de la luminance lumineuse sur la perception de la brillance des intérieurs. Trente sujets ont comparé, à l'aide d'un gradateur, la brillance de bureaux simulés. Dans deux des quatre bureaux, la répartition de la luminance, créée par des plafonniers fluorescents munis de diffuseurs en acrylique K-12, était relativement uniforme. Dans les deux autres bureaux, la répartition de la luminance était non uniforme, les plafonniers fluorescents étant pourvus d'écrans-paralumes paraboliques. Lors d'un exercice de référence, les sujets ont comparé deux pièces où la répartition de la luminance était la même. Lors d'un exercice expérimental, ils ont comparé deux pièces où la répartition de la luminance était non uniforme. Par rapport au plan...

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Section: Discussionmentioning

confidence: 99%

Perceived room brightness: Pilot study on the effect of luminance distribution

Tiller

Veitch

1995

Lighting Research and Technology

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“…A two-channel Maxwellian-view optical system was employed. This type of setup provides three significant advantages: Tt allows obtaining results that do not depend on the pupil variations linked to the luminance or type of illuminant (Berman et al, 1987), it helps to avoid the influence of iris pigmentation or scattering on the results due to the ocular wall (van den Berg, Ijspeert, & De Waard, 1991), and it allows precise control of the retinal illuminance. An exhaustive description of the experimental setup has been previously published (Matesanz et al, 2011).…”

Section: Apparatusmentioning

confidence: 99%

Influence of age and spectral power distribution on mesopic visual sensitivity

Vicente

Arranz

Issolio

et al. 2018

Atten Percept Psychophys

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The ability of the human visual system to detect stimuli at low illumination levels provides awareness of potential risks. The influence of age and spectral power distribution on mesopic spectral sensitivity is analyzed. Two typical light sources are used, a high-pressure sodium lamp (HPS), with a higher content of long wavelengths, and a metal halide lamp (MH), with a higher content of short wavelengths. Two experiments were performed, using a two-channel Maxwellian-view optical system to measure contrast threshold under different experimental conditions. In Experiment 1, three age groups (young, middle-aged and old, n = 2 each), two retinal locations (on-axis and off-axis vision), four background luminances (0.01, 0.07, 0.45, and 3.2 cd/ m 2 ), and two photometry systems (photopic and the MES2 systems) were considered. In Experiment 2, contrast threshold measurement was performed with two age groups (young and old, n = 11 each), one retinal location (off-axis vision), one background luminance (0.01 cd/m 2 ), and two photometry systems (photopic and the MES2 systems). In on-axis vision, neither age nor spectral power distribution have an effect on the contrast threshold. In off-axis vision, however, a significant interaction between age and spectral power distribution is obtained, albeit only at 0.01 cd/m 2 with an MH lamp. Only at this lowest background luminance was the greater content of short wavelengths of this lamp responsible for higher rod stimulation in offaxis vision, with the subsequent improvement in detection performance in young subjects. However, the effect of diffused light inside the aged eye counteracted the benefits of increased rod sensitivity for the MH lamp.

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“…СРП джерел світла може мати інший вплив на сприйняття яскравості середовища, таке як світність [4,[34][35][36][37][38][39][40][41][42], дискомфортні відблиски [43][44][45][46] та циркадні ритми [47][48][49][50]. Такі ефекти можуть відбуватися як на фотопічних, так і на мезопічних рівнях, тому світлотехніки повинні брати їх до уваги при проектуванні світлових установок.…”

Section: автори візуальні задачі та умови результатиunclassified

The spectral power distribution of light and twilight photometry

Nazarenko¹,

Можаровська²,

Usichenko³

2017

Ukrainian Metrological Journal

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Український метрологічний журнал, 2017, № 1 43 УДК 628.98 СПеКТРАЛЬНИЙ РОЗПОДІЛ ПОТУЖНОСТІ СВІТЛА ТА ПРИСМеРКОВА ФОТОМеТРІЯ Л. А. Назаренко, доктор технічних наук, професор Харківського національного університету міського господарства імені О. М. Бекетова (ХНУМГ) Т. В. Можаровська, аспірант ХНУМГ, м. Харків Д. О. Усиченко, інженер з метрології 2 категорії ДП "Харківстандартметрологія" Рис. 1. Фотопічна V(λ) та скотопічна V′ (λ) функції світлової ефективності за МКО Функція в основному охоплює спектральну чутливість фовеа (1…2º ретини) -колбочкових Т. В. Можаровська Д. О. Усиченко Л. А. Назаренко ВИМІРЮВАННЯ ОПТИЧНИХ ТА ОПТИКО-ФІЗИЧНИХ ВеЛИЧИН Український метрологічний журнал, 2017, № 1 44 Спектральний розподіл потужності світла та присмеркова фотометрія фоторецепторів. Пік спектральної чутливості знаходиться на довжині хвилі 555 нм, де за рекомендацією МКО [2] 1 Вт потужності випромінювання на 555 нм визначається як еквівалент для 683 лм [4]. Рис. 2 показує функцію фотопічної світлової ефективності, яка визначає світлову ефективність світла (лм/Вт) для різних видимих довжин хвиль. Рис. 2. Фотопічна V(λ) та скотопічна V′ (λ) функції світлової ефективності, нормалізовані при 555 нм

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Pupillary Size Differences under Incandescent and High Pressure Sodium Lamps

Cited by 16 publications

References 13 publications

Perceived room brightness: Pilot study on the effect of luminance distribution

Perceived room brightness: Pilot study on the effect of luminance distribution

Influence of age and spectral power distribution on mesopic visual sensitivity

The spectral power distribution of light and twilight photometry

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