Lens array and image forming apparatus
A lens array comprises a plurality of lenses disposed on a transparent substrate, and a light-shielding film disposed on the transparent substrate around the plurality of lenses, wherein the light-shielding film comprises a cured uv-curable ink containing a thermal acid generator. A method of manufacturing a lens array includes forming a plurality of lenses on a transparent substrate, depositing a uv-curable ink on the transparent substrate around the plurality of lenses, and curing the uv-curable ink to form a light-shielding film disposed on the transparent substrate around the plurality of lenses, wherein the inside of the light-shielding film is heated after the uv-curable ink is cured.
1. A lens array, comprising:
a plurality of lenses disposed on a transparent substrate; and
a light-shielding film disposed on the transparent substrate around the plurality of lenses,
wherein the light-shielding film comprises a cured uv-curable ink containing a thermal acid generator that generates acid when heated to promote curing of the uv-curable ink; and
wherein the thermal acid generator has a thermal decomposition point below a glass transition point of a material of the plurality of lenses.
2. The lens array according to claim 1 , wherein
the cured uv-curable ink comprises an ultraviolet radiation cured uv-curable ink.
3. The lens array according to claim 1 , wherein
the cured uv-curable ink comprises an ultraviolet radiation cured and heated uv-curable ink.
4. The lens array according to claim 1 , wherein the plurality of lenses and the light-shielding film are disposed on one surface of the transparent substrate.
5. The lens array according to claim 1 , wherein the plurality of lenses and the light-shielding film are disposed on both sides of the transparent substrate.
6. The lens array according to claim 1 , wherein the transparent substrate comprises a glass plate.
7. The lens array according to claim 1 , wherein the transparent substrate comprises a resin plate.
8. An image forming apparatus, comprising:
a light source configured to emit light;
a plurality of lenses disposed on a transparent substrate disposed to receive light emitted by the light source; and
a light-shielding film disposed on the transparent substrate around the plurality of lenses,
wherein the light-shielding film comprises a cured uv-curable ink containing a thermal acid generator; and
wherein the thermal acid generator has a thermal decomposition point below a glass transition point of a material of the plurality of lenses.
9. The image forming apparatus according to claim 8 , wherein
the cured uv-curable ink comprises an ultraviolet radiation cured uv-curable ink.
10. The image forming apparatus according to claim 8 , wherein
the cured uv-curable ink comprises an ultraviolet radiation cured and heated uv-curable ink.
11. The image forming apparatus according to claim 8 , wherein the plurality of lenses and the light-shielding film are disposed on one surface of the transparent substrate.
12. The image forming apparatus according to claim 8 , further comprising a sensor configured to receive focused light from the plurality of lenses.
13. The image forming apparatus according to claim 8 , further comprising a photoconductive drum configured to receive focused light from the plurality of lenses.
14. The image forming apparatus according to claim 8 , wherein the transparent substrate comprises a glass plate.