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Machine translation
1. (WO2006080534) ILLUMINATION OPTICAL APPARATUS AND OPTICAL APPARATUS
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

1. An illumination optical apparatus comprising:
a light-emitting section;
a lens system for converting a diverging beam emitted from the light-emitting section into a beam of collimated light; an afocal optical system for adjusting the cross-sectional area of the beam of collimated light obtained by the lens system; a fly-eye lens for forming a plurality of light-source images from the collimated light whose cross-sectional area is adjusted by the afocal optical system; and
a Koehler illumination optical system that uses the plurality of light-source images formed by the fly-eye lens as a light source.

2. The illumination optical apparatus according to claim 1, wherein a conditional expression 0.25<β<2 is satisfied, where β=Dl/D2, where Dl is the beam diameter of the collimated light obtained by the lens system as measured immediately after the collimated light passes through the afocal optical system and D2 is a beam system right before the collimated light is incident upon the afocal optical system.

3. The illumination optical apparatus according to claim 1, wherein the afocal optical system includes a first group arranged adjacent to the light-emitting section and a second group arranged adjacent to the fly-eye lens, and
the first group forms an image of the light-emitting section between the first group and the second group.

4. The illumination optical apparatus according to claim 3, wherein the afocal optical system can be divided between the first group and the second group.

5. The illumination optical apparatus according to claim 1, wherein the afocal optical system includes an adjustment function of the cross-sectional area of the beam of collimated light obtained by the lens system.

6. The illumination optical apparatus according to claim 1, wherein a plurality of the light-emitting sections is arranged such that optical axes thereof are parallel with each other, and the lens system is a lens array that includes a lens element corresponding to each of the plurality of light-emitting sections to convert light emitted from each of the light-emitting sections into collimated light with the corresponding lens element.

7. The illumination optical apparatus according to claim 6, wherein KF>4KS holds, where KS is the number of lens elements and KF is the number of constituent lenses constituting the fly-eye lens .

8. The illumination optical apparatus according to claim 6, wherein the light-emitting sections and the lens elements are arranged on flat surfaces perpendicular to an optical axis of the afocal optical system such that individual optical axes thereof are parallel with the optical axis of the afocal optical system.

9. The illumination optical apparatus according to claim 6, wherein the plurality of light-emitting sections are constructed so as to emit beams having the same wavelength.

10. The illumination optical apparatus according to claim 1, wherein the afocal optical system and the fly-eye lens are replaceable .

11. An optical apparatus comprising the illumination optical apparatus according to claim 1.

AMENDED CLAIMS
[received by the International Bureau on 30 August 2006 (30.08.06)]

1. (Amended) An illumination optical apparatus comprising:
a light-emitting section;
a lens system for converting a diverging beam emitted from the light-emitting section into a beam of collimated light;
an afocal optical system for adjusting the cross-sectional area of the beam of collimated light obtained by the lens system; a fly-eye lens for forming a plurality of light-source images from the collimated light whose cross-sectional area is adjusted by the afocal optical system; and ,
a Koehler illumination optical system that uses the plurality of light-source images formed by the fly-eye lens as a light source,
wherein a conditional expression 0.25<β<2 is satisfied, where β=Dl/D2, where Dl is the beam diameter of the collimated light obtained by the lens system as measured immediately after the collimated light passes through the afocal optical system and D2 is a beam system right before the collimated light is incident upon the afocal optical system.

2 . (Canceled)

3 . (Canceled)

AMENDED SHEET (ARTICLE 19}

4 . (Canceled)

5. (Canceled)

6. (Amended) An illumination optical apparatus comprising:
a light-emitting section;
a lens system for converting a diverging beam emitted from the light-emitting section into a beam of collimated light;
an afocal optical system for adjusting the cross-sectional area of the beam of collimated light obtained by the lens system; a fly-eye lens. for forming a plurality of light-source images from the collimated light whose cross-sectional area is adjusted by the afocal optical system; and
a Koehler illumination optical system that uses the plurality of light-source images formed by the fly-eye lens as a light source,
wherein a plurality of the light-emitting sections is arranged such that optical axes thereof are parallel with each other, and
the lens system is a lens array that includes a lens element corresponding to each of the plurality of light-emitting sections to convert light emitted from each of the light-emitting sections into collimated light with the corresponding lens element.

7. The illumination optical apparatus according to claim β,

AMENDED SHEET (ARTICLE 19} wherein KF>4KS holds, where KS is the number of lens elements and KF is the number of constituent lenses constituting the fly-eye lens.

8. The illumination optical apparatus according to claim 6, wherein the light-emitting sections and the lens elements are arranged on flat surfaces perpendicular to an optical axis of the afocal optical system such that individual optical axes thereof are parallel with the optical axis of the afocal optical system.

9. The illumination optical apparatus according to claim 6, wherein the plurality of light-emitting sections are constructed so as to emit beams having the same wavelength.

10. (Canceled)

11. (Amended) An optical apparatus comprising the illumination optical apparatus according to claim 1 or 6.

AMENDED SHEET (ARTICLE 19}