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| Author | Subject: Lighting in practice |
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 susie
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Lighting in practice
Mar 15, 2005 19:08:40 Any idea what the illuminance is to be in the test room and within internally illuminated test charts? |
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thesach
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RE: Lighting in practice
Mar 15, 2005 19:37:23 Test room and chart should be within 300Lux with a CCT of 6500K of good colour rendering. Thing to bear in mind is that when it is internally illuminated you dont want the ones you had at uni where the pateint could see the actual lamp inside,therefore it should be uniformally lighted. Whereas extenal lighting should not cause veiling reflections on the chart itself. |
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nerius
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RE: Lighting in practice
Mar 15, 2005 20:59:35 very knowledgeable young man. |
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thesach
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RE: Lighting in practice
Mar 15, 2005 21:33:56 Thank my supervisior |
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nerius
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RE: Lighting in practice
Mar 15, 2005 22:19:40 any idea what kind of bulbs used for projection charts? or any info about them or the surface they project on? |
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thesach
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RE: Lighting in practice
Mar 16, 2005 01:03:52 No idea,use the test chart2000.call the people who make it |
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Maureen
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RE: Lighting in practice
Mar 16, 2005 19:57:41 projector charts use 20W tugnsten halogen lamps. had to replace mine last week. |
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nerius
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RE: Lighting in practice
Mar 16, 2005 22:03:53 thanks maureen |
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Patrick
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RE: Lighting in practice
Mar 18, 2005 10:50:23 Should project onto a matt finish should as ?adonised aluminium |