GB/T 5949-2014Test method for bubble and air line of transparent quartz glass (English PDF)

2.1 Projectors

magnification of 10 to 100 times its precision bench micrometer drum is 0.01mm.

If desired, can be equally accurate reading microscope, measuring microscope.

2.2

gauze, lens cleaning paper, ethanol.

4.1

with a lens cleaning paper to wipe clean the surface of the sample, with gauze dipped ethanol, if necessary, wipe the dirt surface of the sample to be tested again

With a lens cleaning paper or gauze wipe clean.

4.2

Sample visually identify the location of the test, make a mark.

4.3

test bubble, line size and density of the gas, select the appropriate magnification were measured.

4.4

from the sample surface began to adjust the focus, determination marked by the inner diameter of the bubble level, gas line length and width as well as bubbles of gas lines the amount. When measured, the rotary table screw micrometer drum, instrument markings are projected coordinate with bubbles, gas lines clear outline of the left and right, up and down

Side tangent, record the micrometer drum bubble, gas line readings left and right side, up and down the side reading. Each diameter measuring irregularly shaped bubbles

Point of not less than three.

4.5

Determination of the depth distribution of the bubbles, the gas line, first tune the instrument focus on the surface of the sample and record the readings (l0), and then focus to the selected

Bubbles, gas line, measured reading (l1) in the depth direction.

5.1

Record maximum bubble diameter, width and length of the gas line, the number of bubbles, the gas line depth required records.

5.2

micrometer drum bubble, gas line difference between the two readings of the left and right side of the bubble diameter gas line width. For irregularly shaped bubbles, taking

The maximum diameter of the bubble diameter. Difference under the gas line side readings of the length of the gas line.

5.3

bubble, gas line depth according to equation (1).

a = n (l1-l0) (1)

Where.

a --- bubbles, gas line layer to the depth of the sample surface, in millimeters (mm);