Tasco 1575 User Manual
Page 58
THICK 2-7/16" DIAMETER LENS/MIRROR BLANK
Optical glass but has a few bubbles so
was probably meant to be used for con-
denser lenses, but should also be excel-
lent to grind and polish for a mirror.
These have a convex side and a flat side.
2-7/16" diameter by 1-1/8" thick at the center and 7/8"
thick at the edge. You can see through it and it will
make a nice paper weight or attach your favorite photo,
drawing, comic, etc. on the bottom for a magnified view.
Almost 7 ounces of glass.
L3141 $3.50
THICK LENS/MIRROR BLANK, 1-7/8" DIA.
Optical glass but has a few bubbles, so was probably meant to be used for
condenser lenses, but should also be excellent to grind and polish a lens or
small mirror. These have a convex side and a flat side and the diameter is
1-7/8" x 1-1/4" thick. You can see through it and it will make a good paper
weight at the very least (weighs 4.6 oz.).
L3179 $2.00
1.8" FLINT BLANK, SSK4
If you are trying your hand at making achromats , neg-
ative lenses, or flats with high dispersion glass, here's
another heavy flint blank. 1.8" diameter by 0.6" thick.
Type SSK4 made by Schott, this glass has an index of
1.61764 and an abbe v number of 55.1. Glass number is
618551.
L3219 $1.50 or 10 for $12.00
44MM DIA HIGH INDEX PCV LENS BLANK
Glass is marked 850413 indicating an index of refrac-
tion 1.850 and abbe v# of 41.3. Diameter is 44mm by
5mm thick plano concave blank. Curved surface meas-
ures -2.75 diopters. Buy a few and save!
L3577 $0.75 or 10 for $5.00
Page 56 - Glass Blanks
To Order, call toll free: 1-877-7SURPLUS