Photographic flashlight

• US 7,530,701 B2
• Filed: 02/23/2007
• Issued: 05/12/2009
• Est. Priority Date: 02/23/2007
• Status: Expired due to Fees

• Current Assignee: Stuart A. Whang
• Original Assignee: Stuart A. Whang
• Inventors: Chan-Wing, Lawrence Ng
• Primary Examiner(s): Sember; Thomas M
• Application Number:
  US11/710,006
• Publication Number:
  US 20080205031A1
• Time in Patent Office: 809 Days
• Field of Search: 362/16, 362/17, 362/255, 362/361, 359/558, 359/563, 359566-570, 359/574
• US Class Current: 362/17
• CPC Class Codes: G03B 15/02 Illuminating scene

Abstract

A light diffusion arrangement, for a photographic device having a flashlight, includes a diffuser housing, a plurality of diffracting mesh members, and a plurality of light diffusing elements. The diffuser housing has a light-admissible surrounding sidewall radially extended from a base portion to define a light diffraction cavity. The diffracting mesh members are integrally formed on an inner side surface of the surrounding sidewall of the diffuser housing, while the light diffusing elements are integrally formed on an outer side surface of the surrounding sidewall of the diffuser housing, wherein the diffracted light is arranged to impinge on the light diffusing elements from the light diffraction cavity, in such a manner that each of the light diffusing elements is adapted to diverge the diffracted light for diffusing the diffracted light, so as to provide a uniform light diffusion effect as an optimal lighting effect for the photographic device.

Claims

1. A light diffusion arrangement for a photographic device having a flashlight, comprising:

a diffuser housing having a base portion for mounting with said flashlight of said photographic device, and a light-admissible surrounding sidewall extended from said base portion to define a light diffraction cavity within said base portion and said surrounding sidewall;

a plurality of diffracting mesh members formed on an inner side surface of said surrounding sidewall of said diffuser housing, wherein each of said diffracting mesh members is adapted to diffract light impinging thereon to a predetermined direction within said light diffraction cavity for forming corresponding diffracted light; and

a plurality of light diffusing elements formed on an outer side surface of said surrounding sidewall of said diffuser housing, wherein said diffracted light is arranged to impinge on said light diffusing elements from said light diffraction cavity, in such a manner that each of said light diffusing elements is adapted to diverge said diffracted light for diffusing said diffracted light, so as to provide a uniform light diffusion effect as an optimal lighting effect for said photographic device, wherein said base portion of said diffuser housing has a base opening for mounting said flashlight such that light generated by said flashlight is allowed to pass though said light diffraction cavity for being diffracted and diffused by said diffracting mesh members and said light diffusing elements respectively, wherein said light-admissible surrounding sidewall is integrally and radially extended from the base portion to form the light diffraction cavity, wherein said surrounding sidewall forms a circular cross section of said diffuser housing for matching with a spherical propagation of said light coming from said flashlight, wherein said diffracting mesh members are integrally protruded from said inner side surface of said surrounding sidewall, wherein each of said diffracting mesh members is extended along said surrounding sidewall in a cross manner to form a corresponding number of diffraction squares surrounded by four corresponding diffracting mesh members, such that when said light coming from said flashlight impinges on said diffracting mesh members, said light is diffracted, and then partially reflected back to said light diffraction cavity for further diffraction, while a remaining portion of light passes through said surrounding sidewall and reaches said light diffusing elements.

2. The light diffusion arrangement, as recited in claim 1, wherein said light diffusion elements are integrally and spacedly formed on said outer surface of said surrounding sidewall for diffusing said diffracted light passing through said inner surface of said surrounding sidewall, wherein each of said light diffusion elements has a substantially spherical contour and has a concave portion for diverging light passing therethrough, in such a manner that when said diffracted light passes through said light diffusion elements, said diffracted light is further diverged for providing a uniform diffusion of flash light coming out from said diffuser housing.

3. The light diffusion arrangement, as recited in claim 2, wherein each of said diffraction squares has a concave indention formed within said diffusion square such that said light impinging on said concave indentation is preliminarily diverged before reaching said light diffusion elements so as to enhance an extent to which said light is diffused.

4. The light diffusion arrangement, as recited in claim 3, wherein further comprising a front cover provided on a front opening of said diffuser housing, wherein said front cover, having an inverted dome shape, a front concave surface and a corresponding rear convex surface, is detachably attached on a surrounding rim edge portion of said diffuser housing for assisting diffusion of said light in said light diffraction cavity, wherein said front cover is semi-transparent in color for softening said intensity of said light coming therefrom.

5. The light diffusion arrangement, as recited in claim 4, wherein said front cover further has a plurality of light diffusion ribs radially and spacedly formed on said rear convex surface for enhancing said diffusion of light coming from said light diffraction cavity.

6. The light diffusion arrangement, as recited in claim 5, wherein said front cover further has a U-shaped clipping rim formed as a peripheral side edge portion of said front cover, wherein said clipping rim is adapted to detachably clip on said surrounding rim edge portion of said diffuser housing so as to detachably attach said front cover with said diffuser housing without additional equipment.

7. The light diffusion arrangement, as recited in claim 1, wherein each of said diffraction squares has a concave indention formed within said diffusion square such that said light impinging on said concave indentation is preliminarily diverged before reaching said light diffusion elements so as to enhance an extent to which said light is diffused.

8. The light diffusion arrangement, as recited in claim 7, wherein further comprising a front cover provided on a front opening of said diffuser housing, wherein said front cover, having an inverted dome shape, a front concave surface and a corresponding rear convex surface, is detachably attached on a surrounding rim edge portion of said diffuser housing for assisting diffusion of said light in said light diffraction cavity, wherein said front cover is semi-transparent in color for softening said intensity of said light coming therefrom.

9. The light diffusion arrangement, as recited in claim 8, wherein said front cover further has a plurality of light diffusion ribs radially and spacedly formed on said rear convex surface for enhancing said diffusion of light coming from said light diffraction cavity.

10. A light diffusion arrangement for a photographic device having a flashlight, comprising:

a diffuser housing having a base portion for mounting with said flashlight of said photographic device, and a light-admissible surrounding sidewall extended from said base portion to define a light diffraction cavity within said base portion and said surrounding sidewall;

a plurality of diffracting mesh members formed on an inner side surface of said surrounding sidewall of said diffuser housing, wherein each of said diffracting mesh members is adapted to diffract light impinging thereon to a predetermined direction within said light diffraction cavity for forming corresponding diffracted light; and

a plurality of light diffusing elements formed on an outer side surface of said surrounding sidewall of said diffuser housing, wherein said diffracted light is arranged to impinge on said light diffusing elements from said light diffraction cavity, in such a manner that each of said light diffusing elements is adapted to diverge said diffracted light for diffusing said diffracted light, so as to provide a uniform light diffusion effect as an optimal lighting effect for said photographic device, wherein said diffracting mesh members are integrally protruded from said inner side surface of said surrounding sidewall, wherein each of said diffracting mesh members is extended along said surrounding sidewall in a cross manner to form a corresponding number of diffraction squares surrounded by four corresponding diffracting mesh members, such that when said light coming from said flashlight impinges on said diffracting mesh members, said light is diffracted, and then partially reflected back to said light diffraction cavity for further diffraction, while a remaining portion of light passes through said surrounding sidewall and reaches said light diffusing elements, wherein said light diffusion elements are integrally and spacedly formed on said outer surface of said surrounding sidewall for diffusing said diffracted light passing through said inner surface of said surrounding sidewall, wherein each of said light diffusion elements has a substantially spherical contour and has a concave portion for diverging light passing therethrough, in such a manner that when said diffracted light passes through said light diffusion elements, said diffracted light is further diverged for providing a uniform diffusion of flash light coming out from said diffuser housing.

11. The light diffusion arrangement, as recited in claim 10, wherein each of said diffraction squares has a concave indention formed within said diffusion square such that said light impinging on said concave indentation is preliminarily diverged before reaching said light diffusion elements so as to enhance an extent to which said light is diffused.

12. The light diffusion arrangement, as recited in claim 11, wherein further comprising a front cover provided on a front opening of said diffuser housing, wherein said front cover, having an inverted dome shape, a front concave surface and a corresponding rear convex surface, is detachably attached on a surrounding rim edge portion of said diffuser housing for assisting diffusion of said light in said light diffraction cavity, wherein said front cover is semi-transparent in color for softening said intensity of said light coming therefrom.

13. The light diffusion arrangement, as recited in claim 12, wherein said front cover further has a plurality of light diffusion ribs radially and spacedly formed on said rear convex surface for enhancing said diffusion of light coming from said light diffraction cavity.

14. The light diffusion arrangement, as recited in claim 13, wherein said front cover further has a U-shaped clipping rim formed as a peripheral side edge portion of said front cover, wherein said clipping rim is adapted to detachably clip on said surrounding rim edge portion of said diffuser housing so as to detachably attach said front cover with said diffuser housing without additional equipment.

15. A light diffusion arrangement for a photographic device having a flashlight, comprising:

a diffuser housing having a base portion for mounting with said flashlight of said photographic device, and a light-admissible surrounding sidewall extended from said base portion to define a light diffraction cavity within said base portion and said surrounding sidewall;

a plurality of diffracting mesh members formed on an inner side surface of said surrounding sidewall of said diffuser housing, wherein each of said diffracting mesh members is adapted to diffract light impinging thereon to a predetermined direction within said light diffraction cavity for forming corresponding diffracted light; and

a plurality of light diffusing elements formed on an outer side surface of said surrounding sidewall of said diffuser housing, wherein said diffracted light is arranged to impinge on said light diffusing elements from said light diffraction cavity, in such a manner that each of said light diffusing elements is adapted to diverge said diffracted light for diffusing said diffracted light, so as to provide a uniform light diffusion effect as an optimal lighting effect for said photographic device, wherein said diffracting mesh members are integrally protruded from said inner side surface of said surrounding sidewall, wherein each of said diffracting mesh members is extended along said surrounding sidewall in a cross manner to form a corresponding number of diffraction squares surrounded by four corresponding diffracting mesh members, such that when said light coming from said flashlight impinges on said diffracting mesh members, said light is diffracted, and then partially reflected back to said light diffraction cavity for further diffraction, while a remaining portion of light passes through said surrounding sidewall and reaches said light diffusing element, wherein each of said diffraction squares has a concave indention formed within said diffusion square such that said light impinging on said concave indentation is preliminarily diverged before reaching said light diffusion elements so as to enhance an extent to which said light is diffused.

16. The light diffusion arrangement, as recited in claim 15, wherein further comprising a front cover provided on a front opening of said diffuser housing, wherein said front cover, having an inverted dome shape, a front concave surface and a corresponding rear convex surface, is detachably attached on a surrounding rim edge portion of said diffuser housing for assisting diffusion of said light in said light diffraction cavity, wherein said front cover is semi-transparent in color for softening said intensity of said light coming therefrom.