1. A process for the removal of mercury from an alkali solution or an alcoholic alkali metal alkoxide solution contaminated with mercury, wherein the alkali solution or alcoholic alkali metal alkoxide solution contaminated with mercury is first filtered through carbon, then filtered through an inert fiber material and then the alkali solution or the alcoholic alkali metal alkoxide solution is distilled wherein the distillation comprises introducing the solution into a distillation column above the column bottom, distilling off water or alcohol and removing the alkali solution or alcoholic alkali metal alkoxide solution depleted in mercury at the column bottom.
2. A process as claimed in claim 1, wherein apart from the alkali solution or alcoholic alkali metal alkoxide solution contaminated with mercury, additional solvent is introduced into the column.
3. A process as claimed in claim 2, wherein the alkali solution or alcoholic alkali metal alkoxide solution contaminated with mercury and additional solvent is introduced into the column in a volume ratio in the range from 30:1 to 1:3.
4. A process as claimed in claim 1, wherein the alkali solution or alcoholic alkali metal alkoxide solution contaminated with mercury is introduced at the column top.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A liquid crystal lens comprising:
a liquid crystal layer;
at least two driving electrode plates, wherein the liquid crystal layer is arranged between the adjacent driving electrode plates, and each of the driving electrode plates comprising:
a transparent substrate comprising a surface;
a circuit layer deposited on the surface;
an insulating layer covering the circuit layer;
an electrode layer deposited on the insulating layer;
at least a conducting pillar arranged in the insulating layer, the pillar connected to the electrode layer and the circuit layer; and
an alignment layer abutting the liquid crystal layer, wherein the electrode layer is interposed between the alignment layer and the insulating layer, wherein the electrode layer of at least one of the driving electrode plates comprises at least two ring-shaped electrodes, one of the ring-shaped electrodes encircles the other ring-shaped electrode, and the ring-shaped electrodes have the same geometric center;
wherein the circuit layer of one of the at least two driving electrode plates comprises n ring-shaped electrodes and n traces, the ring-shaped electrodes connect to the traces respectively, and the traces distribute in an isometric way about the geometric center, wherein n is positive integer and is larger than 2, and the angle between two adjacent traces is 360n degree.
2. The liquid crystal lens of claim 1, wherein each of the insulating layer of the driving electrode plate has a thickness of about 20-25 nm.
3. The liquid crystal lens of claim 1, wherein each of the alignment layer of the driving electrode plate has a thickness of about 35-40 nm.
4. The liquid crystal lens of claim 1, wherein a distance between an outer diameter of one of the ring-shaped electrode and an inner diameter of the adjacent ring-shaped electrode is about 0.1 mm, the outer diameter is smaller than the inner diameter.
5. A liquid crystal lens module comprising two liquid crystal lenses, the liquid crystal lenses arranged in the transmitting path of a light source, wherein the liquid crystal lens comprising:
a liquid crystal layer;
at least two driving electrode plates, wherein the liquid crystal layer is arranged between the two adjacent driving electrode plates, and each of the driving electrode plate comprising:
a transparent substrate comprising a surface;
a circuit layer deposited on the surface;
an insulating layer covering the circuit layer;
an electrode layer deposited on the insulating layer;
at least a conducting pillar arranged in the insulating layer and connected to the electrode layer and the circuit layer; and
an alignment layer abutting the liquid crystal layer, wherein the electrode layer is interposed between the alignment layer and the insulating layer, wherein the electrode layer of at least one of the driving electrode plates comprises at least two ring-shaped electrodes, one of the ring-shaped electrodes encircles the other ring-shaped electrode, and the ring-shaped electrodes have the same geometric center;
wherein the circuit layer of one of the at least two driving electrode plates comprises n ring-shaped electrodes and n traces, the ring-shaped electrodes connect to the traces respectively, and the traces distribute in an isometric way about the geometric center, wherein n is positive integer and is larger than 2, and the angle between two adjacent traces is 360n degree.
6. The liquid crystal lens module of claim 5, wherein each of the insulating layer of the driving electrode plate has a thickness of about 20-25 nm.
7. The liquid crystal lens module of claim 5, wherein each of the alignment layer of the driving electrode plate has a thickness of about 35-40 nm.
8. The liquid crystal lens module of claim 5, wherein the distance between an outer diameter of one of the ring-shaped electrodes and an diameter of the adjacent ring-shaped electrode is about 0.1 mm, the outer diameter is smaller than the inner diameter.