JaminRat
Fish Crazy
Thanks for the kind comments folks. I'll keep the pictures coming.
Got my digi thermometer swaped today so that's all good.
Rvdbarnes there is no hood or cover glass due to 2 factors the first being that even the most highly polished piece of glass will reduce the amount of transmitted light by approx 8%. The only way to improve this would be to apply an antireflective film to either side of the glass. Much like they do with spectacles. This however is expensive and highly specialist and even if it was perfect (very unlikely through the full light spectrum) you would still loose 2% of the light which would be absorbed by the glass itself. I new being an optical technicien would come in usefull
The reason for no hood is much simpler it makes it easier to maintain a constant temp.
Please keep in mind all of the above figures are based on a piece of sodalime glass with a refractive index of 1.52nd and will vary for different glass types for example plastic or polycarbonate will give much greater loses.
Got my digi thermometer swaped today so that's all good.
Rvdbarnes there is no hood or cover glass due to 2 factors the first being that even the most highly polished piece of glass will reduce the amount of transmitted light by approx 8%. The only way to improve this would be to apply an antireflective film to either side of the glass. Much like they do with spectacles. This however is expensive and highly specialist and even if it was perfect (very unlikely through the full light spectrum) you would still loose 2% of the light which would be absorbed by the glass itself. I new being an optical technicien would come in usefull
The reason for no hood is much simpler it makes it easier to maintain a constant temp.Please keep in mind all of the above figures are based on a piece of sodalime glass with a refractive index of 1.52nd and will vary for different glass types for example plastic or polycarbonate will give much greater loses.
