DAVID ALAN PALMER

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DAVID ALAN PALMER 2000 سد سح سر زر #نامامء. ‎fete)‏ 

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اس مسج( ,ما مسا راون اور 9 - 99 ,سوم - اون امه ‎Asoperidl Ovllexe - PAO, (OG: supervisor 0.0. Oright‏ ‎Daticcal Physica Loboraiory - (OGO‏ ‎Oaticcd Physicd baboratory - 0.6. Giles‏ #نامامء. ‎fete)‏ 

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OCD - gecerd duties tocludiogy ‏تسام‎ ‏مه - را(‎ OrawPord & colour readericey O14 - chair oP colour ‏او ول‎ 1999۶ WO - Testitute DP Opktkakerbyy, OO’? #نامامء. ‎fete)‏ 

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Scotopic Luminance 4 8 2 4 8 (log cd m2) Luminance of Starlight Maonlight Indoor lighting Surligh ‘whlta paper in cw erens ia eae este eae ee Scotopic Beer Photopic Visual ۲۱06۹00 ‏بسا سس‎ Row Cons Rod saturation Decom‘or Damage threshole threshold begins possible No colvur vision Goud coleul visio Cone Poor acuity pa Good acu ty saturation Emergency lighting in build ngs Note: Damage canarise ‘om cuirulalive xaosure tc luminanee levels thet are not Suburban road Uneamtoracve te view lightirg level High speed road lighting level Typical light levels 

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صا رده تنا رو که با جوا تقو بل ‎opproxketios, oo‏ لو و سا سود میا رسای اوه وه ع که وخ ۸( م۱ ‎be = [Oy li) OU) di‏ ‎Dhe question &, “hot is her Rocrtva?”‏ ما موم کج موه تحت لوط روط انس اس نج رو ‎white ight oF 0‏ ماو وا اوق ما عوقو ‎Ot watck, L,,, he‏ و2 وا م۱ ص مه مها وا اوه مه ‎creed‏ oe parted oad by Ly ploted acpi by Ly (هه) «نامعه 

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00036 2 3 00 001 01 1 S (cd.m’) Darid's plot of boy Ly sepia boy by 9.0007 0.00 

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ی عم لت و ‎levels, cro parte to the (5 xis ot highs eves.”‏ ‎ui ockiivay we ol perPect sv there were‏ حلمب اه زمره ‎departures Prow‏ oP pack mune. Dhe dota Pitted ‏جك باعسوجلكه‎ هو ee و 99۰9 0+ | ‏ها و۳‎ 0 vex set ot the Pre shows how wel the data Bitar ‏سكن‎ ۱۱6,۵۸ - 

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Osta Pree viker workers Pited the soodel well cosidertory the problecos baru to exist wits ocktiviy - kere one tata Pro ‏,بو‎ JOG@, GEC99, 0666© #نامامء. ‎fete)‏ 

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موه و - ‎kara Por velebratay Okriekvar it side‏ کب ارو ‎howe, vevdly Dickewskra, war Polowed Bor Pood, decks ood‏ + Aa en the fab hod he bear oP fee esas wi Cupra Outle Pros Orerbey ord Goa a this David reverded high tet oy ot ‏مه لصي‎ #نامامء. ‎fete)‏ 

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sehtow depicted berouse qare, koloy ced cooirast ratios are wt RUBY Dr possible io paphune D7oViTTiy 

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۱ Pa CC en Cae re 

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Lighting eee ۱۹۵562۲68 er 0 سس عسل ‎١١‏ ۰۲661۱۳۱۵۱۵۵9 99 Colour renderi g tolerance: in the CIE system M. B. Halstead, BSc. A.lnst.P., F.lllum.E.S.; D. |. Morley, C.Eng., M.LE.E.; D. A. Palmer, B.Sc., Ph. AR.CS.; and A. G. Stainsby, M.B.E., B.Sc., C_Eng., F.LE.E., F.Inst.P. تام مان با ‎wean‏ و مسوم ان و ای و #نامامء. ات 

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35 53 69 Lighting Research and Technology ISSN 0024-3426 Volume 23 Number 1 1991 Cumulative index for Volumes 1-22 (1969-1990) The effect on clinical judgements of new types of fluorescent lamp: | Experimental arrangements and clinical results PA Lovett, MB Halstead, A R Hill, D A Palmer, TS Sonnex and M R Pointer The effect on clinical judgements of new types of fluorescent lamp: II Colour measurements and statistical analysis PA Lovett, MB Halstead and A R Hill The effect on clinical judgements of new types of fluorescent lamp: Ill Further statistical analysis leading to a new specification for lamps PA Lovett, A 8 Hill and MB Halstead #نامامء. (هه) 6860۴ 

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(Por this work the teow were awarded the Dulsk-Destera roar Orda of the Chartered Tositue oF Quilcoy Gervices ‏وب‎ ۱ 999 #نامامء. ‎fete)‏ 

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(euke ciotes oud ‏اك وموم سواه لجكاصب مصكاز كدت ضوعم‎ tke 017 ‏سصاصدا اج (1) خأن برةجسورفه‎ Dhere we hed Poor wik svachire protection (ie. suenfessez) رب 9۶ Description SEN 1836, Fter Category 3. CE mark Bull Comfortable tt on node and eat. Sinall bur sturdy hinges Lenses: Sina lenses let ight in above and at uitable for driving, to جرج سا مه لم رم ‎(Dr‏ ‎ever oP‏ ایو رو سر ‎send checked‏ مه ما لو ات و #نامامء. ‎fete)‏ 

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DAVID PALMER 70 7 We, (Alon ata 7a + Te{A).VIA).@p(A).dd sna مود ‎(A).‏ ار ع 10 00۸۵ ر 380 مصاع a, cord dae, express pe ‏مر و سا اوه‎ 2 50 2 20 Bo fad 8 arene EZ #نامامء ات 

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‎ves baked‏ مها ‎os did the search Por the perPert‏ لكصبي ومس ‎Obkrstoas ud ‎ ‎Qed cootnued hi work, stated wil Briaa ‏اس‎ ‎be Bore, ox hisrisnsayy Brats: ‏#نامامء. ‎fete)‏ 

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DAVID PALMER #نامامء ات 

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oo | 750 | 650 Scotopic luminosity function of protanopes. Dotted lines enclose the range of values from Crawford (1949) and the solid curve is CIE Via} 7 1 8 wavelength (nm! 50 450 400] كبجها عومج كا جاص هي با مجه لعصوم اه و و iance (logW~'.sr.m2) Log reciprocal ra #نامامء. ‎fete)‏ 

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ve data foter وب وه بو 2 510 508 $08 504 502 $00 498 وب جود ذا عرسا ۳ ۲ 6 ام اوه مد لو Ses ‎can ower tas the OTB munve oad the peak waveteoyhs‏ لصو ‏یی او با ارام امه ای یط لوط اب ‎CrawPord‏ ‎were yrouped oe show be‏ ‎494 408 498 500 502 504 508 50a 510 812 Deez [am ‎ ‎ ‎spolgns jo sequinu ‏#نامامء. ‎ ‏(هه) 6860۴ 

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قح ‎roves wi womdera equiped‏ دوجو و اوه ارو ed to hoo ebout pre-retca ubsprpive 9 we eet dba were ihe Oe code ‏مس روم‎ wis David's Pane orctertl = rad & OO che ۵ ‏هه‎ Pred ‏و مد‎ ade ood oe ‏سس وه ای‎ ۱ ‏جر سس ری یچ‎ ‏وا‎ that Dovid was take i - ke cover worked acai #نامامء. ات 

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Oud ‏و‎ ocd wes appoed af the yecerd tarts oF ‏روص وهای‎ oF ‏اوه ری‎ by those “educated” lies thot wade up vorous ‏واه‎ Ae worked to Keprove ‏موی بل‎ of ‏و رت وه‎ the eet oP ‏بط له و‎ Royal lorie 1 1 1003۲ i ih ۱۱ ‏رز‎ Ei ‏و۱‎ 0 ' #نامامء. ‎fete)‏ 

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‎MAXWELL at Cambridge‏ مر ‎GROUP (GB) olds the colour top (1855)‏ ‎ 

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#نامامء. ‎fete)‏ 

DAVID ALAN PALMER July 1933 - June 2000 COLOUR GROUP (GB) Christ’s College, Hendon Lane, Grammar School Imperial College - physics, 1952 - 1955 Imperial College - PhD, 1958: supervisor W.D. Wright National Physical Laboratory - 1958 COLOUR GROUP (GB) National Physical Laboratory - W.S. Stiles NPL - general duties including photometry NPL - Brian Crawford & colour rendering NIC - chair of colour rendering committee 1965-7 IoO - Institute of Ophthalmology, 1967 COLOUR GROUP (GB) MESOPIC PHOTOMETRY COLOUR GROUP (GB) MESOPIC PHOTOMETRY “The equivalent luminance L of any light may be expressed, to a good approximation, as a function of its scotopic and photopic luminances.” L L P S   E 1 (  ) V (  )  d    E 2 (  ) V ' (  )  d  The question is, “What is this function?” David measured scotopic and photopic luminances by matching test lights of different wavelengths to white light of 2042K At match, LV, the equivalent luminance follows the relation: L COLOUR GROUP (GB) P LV L S and the scotopic and photopic luminances can be calculated and log LP plotted against log LS COLOUR GROUP (GB) David’s plot of log LP against log LS Palmer said that ideally the plots should show, “straight lines parallel to the P axis at very low levels, and parallel to the S axis at high levels.” But additivity was not perfect so there were departures from this especially at the ends of each curve. The data fitted adequately the expression: M S  P L (S , P )  M  P 2 which is the form that the Palmer Mesopic Model is usuall set out: the figure shows how well the data fit the relation COLOUR GROUP (GB) COLOUR GROUP (GB) Data from other workers fitted the model well considering the problems know to exist with additivity - here are data from Kinney, JOSA, 58:1296, 1968 Christmas Celebrations David was known for celebrating Christmas in style - a chosen theme, usually Dickensian, was followed for food, drink and decor COLOUR GROUP (GB) and the lab had the benefit of last years decorations, for example, celebrations with Captain Cuttle from Dombey and Son In this David revealed high talent as an artistic draughtsman ENTOPTIC PHENOMENA - in art the light source was seldom depicted because glare, halos and contrast ratios are not easy or possible to capture convincingly COLOUR GROUP (GB) A search for halos and glare showed many artists capturing the drama of light and shade but hiding the source COLOUR GROUP (GB) COLOUR RENDERING This was the first of a long series of papers on colour rendering and . . . . . . . the effects of new fluorescent lamp phosphors on clinical evaluation of patients and skin lesions COLOUR GROUP (GB) COLOUR RENDERING And this was the last set of papers in the series COLOUR GROUP (GB) COLOUR RENDERING For this work the team were awarded the Walsh-Western Bronze Medal of the Chartered Institute of Building Services Engineers in 1993 COLOUR GROUP (GB) RETIREMENT In the ninties David retired and then worked afternoons at the University of Westminster There we had fun with sunglare protection (i.e. sunglesses) We evaluated sunglasses for magazines and checked for safety a whole range of toys which contained laser light sources COLOUR GROUP (GB) Traffic signal light recognition involved sorting out the infamous Q Factor and doing experiments on signal colour recognition COLOUR GROUP (GB) CHRISTMAS again....and the sloe gin recipe competitions continued as did the search for the perfect microwave oven baked Christmas Pud David continued his work, started with Brian Crawford years before, on luminosity functions COLOUR GROUP (GB) David showed normal observers’ photopic luminosity functions for large fields fell into one of three groups COLOUR GROUP (GB) David measured protanopes’ scotopic luminosity functions and showed they were reduced at long wavelengths - evidence that scotpic vision is a mix of rod and L wavelength cone inputs COLOUR GROUP (GB) David re-analysed the original scotopic luminosity function data of Crawford which had been used to formulate the CIE internationally agreed curve and found some surprises: many curves were considerably narrower than the CIE curve and the peak wavelengths were grouped as shown below COLOUR GROUP (GB) David started to re-measure these curves with modern equipment but had to know about pre-retinal absorption so we set about measuring the macular pigment We made many prototypes with David’s favourite material - card & UHU glue Six instruments of the final design were made and are used across Europe It was whilst calibrating one of these that David was taken ill he never worked again COLOUR GROUP (GB) PROMOTION OF SCIENCE David hated the way the Government treated science and scientists, and was appalled at the general lack of understanding of science, especially by those “educated” elites that made up various authorities He worked to improve the understanding of science with, e.g. the Institute of Physics and the Royal Institution COLOUR GROUP (GB) James Clerk Maxwell - a model and hero COLOUR GROUP (GB) DAVID PALMER vision scientist 19332000 COLOUR GROUP (GB)