Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!usc!sdd.hp.com!hplabs!hpcc05!col!dunphy
From: dunphy@col.hp.com (Dan Dunphy)
Newsgroups: sci.electronics
Subject: Re: light meter, Blue Diodes, visible light phototransistors
Message-ID: <16120025@col.hp.com>
Date: 27 Jan 91 06:48:03 GMT
References: <1990Dec24.033306.15182@ecf.utoronto.ca>
Organization: HP Colorado Springs Division
Lines: 5

Silicon light sensors are deficient in blue sensitivity. The
device you refer of is a blue enhanced silicon cell. I really
don't know how this is done, possibly a dopant, or a filter.A
This type if cell is what is used in most if not all
photographic light meters.