1. A firearm sling enhanced method for aiming and shooting a firearm having a bipod with downwardly projecting bipod legs, comprising:
securing a first sling strap section of a firearm sling to the downwardly projecting bipod legs of a shoulder fired firearm, the first sling strap section having a pair of bipod connection straps each having releasable connection with one of the downwardly projecting bipod legs, the first sling strap section also having a first releasable connector through which said first sling strap section is adjustably extended to define a free end portion of the first sling strap section;
securing a second sling strap section of said firearm sling about the body of a user, said second sling strap section having a second releasable connector through which said second sling strap section is extended to define a second sling strap end;
establishing releasable connection of said first and second releasable connectors and establishing connection of said first and second sling strap sections; and
adjusting said firearm sling by selective application of manual force to said first sling strap section free end portion to achieve desired relative positioning of said first and second sling strap sections of said firearm sling and the shoulder fired firearm to achieve sufficient tension to urge a buttstock portion of the shoulder fired firearm against a shoulder of the user with sufficient force to cause the tension force of said firearm sling and the body anatomy of the user to return the firearm substantially to the aiming position following dissipation of the recoil energy resulting from discharge of the firearm.
2. The firearm sling enhanced method of claim 1, wherein each of said bipod connection straps defines a bipod connector loop, said method comprising: extending each of said downwardly projecting bipod legs through said bipod connector loops of said bipod connection straps and establishing releasable connection of said bipod connection straps with the bipod legs.
3. The firearm sling enhanced method of claim 1, wherein the firearm bipod establishes a single point of firearm sling connection, said method comprising;
attaching a single strap connection member of said firearm sling to the single point of firearm sling connection; and
upon said adjusting method step, said single strap connection member applying a tension force to said bipod and urging the buttstock of the firearm tightly against the shoulder of the user.
4. The firearm sling enhanced method of claim 1, wherein said second sling strap section of said firearm sling defines a body strap connector section having a body strap connector defining a body strap of sufficient length to extend about the back and under the arms of the user and defines a terminal end portion, said second sling strap section having a buckle member in assembly therewith receiving said terminal end portion of said body strap, said method step of securing a second sling strap section of said firearm sling about the body of the user comprising:
extending said body strap of said firearm sling about a selected portion of the torso of the user’s body and extending said terminal end portion of said body strap through said buckle member; and
applying a pulling force to said terminal end portion of said body strap for adjusting said body strap for desired tightness about the torso of the user’s body.
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 display apparatus, comprising:
a light source which is configured to emit a light;
a first light modulation unit which is configured modulate the light emitted from said light source;
a first drive unit which is configured to drive said first light modulation unit;
a projection unit, which is configured to project the light from said first light modulation unit enlargedly;
a second light modulation unit, which is configured to modulate the light emitted from said projection unit so as to be emitted to an observer side;
a second drive unit which is configured to drive said second light modulation unit; and
an optical direction conversion unit, which is configured to convert the light from said projection unit so that the light is incident upon an incident surface of said second light modulation unit in a direction approximately perpendicular thereto.
2. The display apparatus, as described in claim 1, wherein said second light modulation unit is a liquid crystal panel.
3. The display apparatus, as described in claim 2, wherein said first light modulation unit is smaller than said second light modulation unit.
4. The display apparatus, as described in claim 1, wherein said optical direction conversion unit is a Fresnel lens sheet.
5. The display apparatus, as described in claim 2, wherein said second light modulation unit has polarizing plates on an incident side and an emission side of said second light modulation unit.
6. The display apparatus, as described in claim 1, wherein said light source comprises a lamp, and a reflector covering said lamp from a reverse side thereof for reflecting the light from said lamp to convert the light into a parallel light.
7. The display apparatus, as described in claim 1, wherein the following relation is satisfied:
10<L1L2<150
where a screen size of said second light modulation unit is L1, and a screen size of said first light modulation unit is L2.
8. The display apparatus, as described in claim 4, wherein said Fresnel lens sheet has a refractive type Fresnel lens, which is configured to refract the light which is within a predetermined value of an incident angle so as to be emitted therefrom, and a total-reflection type Fresnel lens which is configured to cause a total reflecting of the light which is at least equal to the predetermined value of the incident angle.
9. The display apparatus as described in claim 8, wherein a plurality of said refractive type Fresnel lens and a plurality of said total-reflection type Fresnel lens are formed concentrically.
10. The display apparatus, as described in claim 2, wherein one pixel of said first light modulation unit corresponds to a plurality of pixels of said second light modulation unit.
11. The display apparatus, as described in claim 2, wherein one pixel of said first light modulation unit corresponds to a one pixel of said second light modulation unit.
12. The display apparatus as described in claim 5, wherein said light source comprises at lest one of a high-pressure mercury lamp, a LED and a laser.
13. The display apparatus as described in claim 1, wherein said first light modulation unit and said light source are exchangeable, respectively.
14. The display apparatus as described in claim 1, wherein said projection unit comprises the following, being disposed, sequentially, from the incident surface of said second light modulation unit to said first light modulation unit;
a first mirror including a rotationally asymmetric reflection surface; and
a first lens group having at least a rotationally asymmetric lens located on a side of said first mirror facing to said first light modulation unit, and a second lens group having a positive refraction power.
15. The display apparatus as described in claim 14, wherein an effective cross-section size of said first mirror in direction perpendicular to a screen surface and an effective cross-section size of a portion close to said second light modulation unit differs, with respect to an optical axis of said projection unit.
16. The display apparatus as described in claim 15, wherein at least one piece of a flat surface second mirror is disposed between said first mirror and said second light modulation unit.