1. A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprising:
an image display element;
a lens group, being disposed behind said image display element, comprising therein, a front lens group made up with a plural number of lenses, including, at least, a refractive lens, having a positive power and being rotationally symmetric in a surface configuration thereof, and a rear lens group made up with a plural number of lenses, including, at least, a lens having a free curved surface configuration and being rotationally asymmetric, thereby emitting the image displayed on said image display element;
a reflection mirror for reflecting the light from said lens group, thereby projection onto said projection surface, obliquely; and
a movement member for moving the plural number of lenses of said rear lens group.
2. The projection-type image display apparatus described in the claim 1, wherein said movement member moves said rear lens group into a direction of an optical axis of said lens group.
3. The projection-type image display apparatus described in the claim 1, wherein curvature in a portion, through which the light entering into a lower end portion of said projection surface passes, differs from curvature in a portion, through which the light entering into an upper end portion of said projection surface passes, within a part of said plural number of lenses of said rear lens group.
4. The projection-type image display apparatus described in the claim 1, wherein said rear lens group comprises, at least, a spherical lens being rotationally symmetric, and an aspheric lens being rotationally symmetric.
5. The projection-type image display apparatus described in the claim 1, wherein said rear lens group comprises:
a first lens and a second lens, having a negative power and being rotationally symmetric, and
a third lens and a fourth lens, for transmitting the light from said second lens.
6. The projection-type image display apparatus described in the claim 5, further comprising:
a mechanism for rotating said first and second lenses.
7. The projection-type image display apparatus described in the claim 1,
wherein a normal line upon a display surface of said image display element is inclined with respect to the optical axis of said lens group.
8. A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprising:
an image display element;
a lens group, being disposed behind said image display element, comprising therein, a front lens group made up with a plural number of lenses, including a refractive lens having a positive or negative power and being rotationally symmetric in a surface configuration thereof, and a rear lens group made up with a plural number of lenses, including a lens having a free curved surface configuration and being rotationally asymmetric on surface configuration thereof;
a reflection mirror, being rotationally asymmetric and having a convex configuration into a reflecting direction in a portion thereof, for reflecting the light from said lens group, thereby projection onto said projection surface, obliquely; and
a movement member for moving each of the plural number of lenses of said rear lens group into direction of the optical axis of said lens group.
9. The projection-type image display apparatus described in the claim 8, wherein said rear lens group further comprises a lens, in which curvature in a portion, through which the light entering into a lower end portion of said projection surface passes, differs from curvature in a portion, through which the light entering into an upper end portion of said projection surface passes.
10. The projection-type image display apparatus described in the claim 8, wherein said rear lens group further comprises at least a spherical lens being rotationally symmetric, and an aspheric lens being rotationally symmetric.
11. The projection-type image display apparatus described in the claim 8, wherein a normal line upon a display surface of said image display element is inclined with respect to the optical axis of said lens group.
12. A projection-type image display apparatus for projecting an image, enlargedly, onto a projection surface, comprising:
an image display element;
a lens group, being disposed behind said image display element, including therein, a front lens group made up with a plural number of lenses, including therein a refractive lens, being rotationally symmetric in surface configuration thereof and having a refractive lens of a positive or negative power, and a rear lens group, including a first lens and a second lens, each having a negative power and being rotationally symmetric, and a third lens and a fourth lens for transmitting the light from said second lens, each having a free curved surface configuration;
a reflection mirror, being rotationally asymmetric and having a convex configuration into a reflecting direction in a portion thereof, for reflecting the light from said lens group, thereby projection onto said projection surface, obliquely; and
a movement member for moving each of the plural number of lenses of said rear lens group into direction of the optical axis of said lens group.
13. The projection-type image display apparatus described in the claim 12, further comprising a mechanism for rotating said first and second lenses.
14. The projection-type image display apparatus described in the claim 12, wherein a normal line upon a display surface of said image display element is inclined with respect to the optical axis of said lens group.
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 encouraging the presentation of a series of unpaid debts from a service provider to a collection agency for pursuing collection on the unpaid debts, the method comprising the steps of:
providing a debt collection service for a flat fee;
receiving a request from the service provider to perform the debt collection service to collect on an unpaid debt;
collecting at least a portion of the unpaid debt; and
subtracting at least a portion of the flat fee from the portion of the unpaid debt that has been collected.
2. A method as recited in claim 1, wherein the debt collection service requires at least a minimum number of requests to be received over a period of time.
3. A method for encouraging the for-warding of unpaid debts to a collection agency for pursuing collection on the unpaid debts, the method comprising the steps of:
providing a debt collection service in exchange for a flat fee;
receiving a request to perform the debt collection service to collect on an unpaid debt;
collecting at least a portion of the unpaid debt; and
offsetting at least a portion of the flat fee from the portion of the unpaid debt that has been collected, and using that portion as the offset for payment of the flat fee.
4. A method as recited in claim 3, further comprising the steps of:
determining whether a quantity of flat-fee vouchers are desired to collect unpaid debts; and if the vouchers are desired, subtracting a payment for the vouchers from the service provider’s portion of collected debt prior to providing the service provider’s portion to the service provider to whom the unpaid debt is owed.
5. A method as recited in claim 3, wherein the vouchers include a quantity of vouchers which comprise a minimum number of vouchers required for purchase by a service provider.
6. A method as recited in claim 3, wherein the debt collection service requires placement of a predetermined volume of high quality debt.
7. A method as recited in claim 3, wherein prior to participating in the method, an individual must complete at least a portion of an education course relative to the method.