1. A television receiver comprising:
a receiving section to receive a broadcast signal associated with predetermined broadcasting;
a video display section to display received video based on the broadcast signal received by the receiving section in a predetermined display region;
a judgment region setting section to set a judgment region for judging whether or not the broadcasting has ended, at a center of the display region of the video display section;
an off-timer control section to count a predetermined set time, and to switch the power source of the television receiver from ON to OFF when the set time lapses;
a judging section to judge whether or not the broadcasting has ended, on a basis that a ratio of chronological fluctuation of received video in the judgment region of the received videos corresponding to the broadcast signal is within a predetermined range, while the off timer control section counts the set time; and
a video stop control section to switch off the power source of the television receiver, on a basis that the judging section judges that the broadcasting has ended.
2. A television receiver comprising:
a receiving section to receive a broadcast signal associated with predetermined broadcasting;
a video display section to display received video based on the broadcast signal received by the receiving section in a predetermined display region;
a judgment region setting section to set a judgment region for judging whether or not the broadcasting has ended, the judgment region being in the display region of the video display section;
a judging section to judge whether or not the broadcasting has ended, based on a received video in the judgment region of the received video corresponding to the broadcast signals; and
a video stop control section to switch off the power source of the television receiver, on a basis that the judging section judges that the broadcasting has ended.
3. The television receiver according to claim 2, wherein the judging section judges end of the broadcasting on a basis that the ratio of chronological fluctuation of the received video is within a predetermined range.
4. The television receiver according to claim 2, further comprising: an off-timer control section to count a predetermined set time, and to switch the power source of the television receiver from ON to OFF when the set time lapses,
wherein a judging section judges whether or not the broadcasting has ended, while the off-timer control section counts the set time.
5. The television receiver according to claim 3, further comprising: an off timer control section to count a predetermined set time, and to switch the power source of the television receiver from ON to OFF when the set time lapses,
wherein a judging section judges whether or not the broadcasting has ended, while the off timer control section counts the set time.
6. The television receiver according to claim 2, wherein the judging region is set at a center of the display region.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A method for reducing the contamination of at least one optical component that is contained inside a beam guidance space and that is held by a frame defining the beam guidance space, comprising:
coating the surfaces of the frame neighboring the beam guidance space at least partially with a degassing barrier layer.
2. A method according to claim 1, wherein the degassing barrier layer is chosen such that it does not increase reflectivity.
3. A method according to claim 1, wherein the degassing barrier layer is designed such that it does not increase reflectivity for UV light with wavelengths of 157 nm, 193 nm, 248 nm, and 365 nm.
4. A method according to claim 1, wherein the degassing barrier layer is a chemically deposited nickel layer, or silver, gold, or tantalum layer.
5. A method according to claim 4, wherein the degassing barrier layer is a chemically deposited nickel layer in form of a NiP alloy layer applied in a chemical depositing process in an electrolyte that contains sodium hypophosphite as a reducing agent.
6. An optical beam guidance system for UV light comprising:
a frame defining a beam guidance space and containing at least one optical component inside the beam guidance space; and
a degassing barrier layer that at least partially coats the surfaces of the frame neighboring the beam guidance space.
7. An optical beam guidance system according to claim 6, wherein the degassing barrier layer does not increase reflectivity.
8. An optical beam guidance system according to claim 6, wherein the degassing barrier layer does not increase reflectivity for UV light with wavelengths of 157 nm, 193 nm, 248 nm, and 365 nm.
9. An optical beam guidance system according to claim 6, wherein the degassing barrier layer is a chemically deposited nickel layer, or silver, gold, or tantalum layer.
10. An optical beam guidance system according to claim 9, wherein the chemically deposited nickel layer is a NiP alloy layer deposited chemically in an electrolyte that contains sodium hypophosphite as a reducing agent.
11. An optical beam guidance system according to claim 6, wherein the optical beam guidance system is configured as a lithography illumination system.