Stage lighting fixture
AssigneeClay Paky S.p.A.
InventorsPasquale Quadri, Angelo Cavenati
Life of this patent
Estimating the term…
Abstract
A stage lighting fixture having: a casing having a closed first end and an open second end; a light source housed inside the casing, close to the first end, and which emits a light beam along an optical axis; an optical assembly positioned to intercept the light beam, and having a focal point located between the light source and the optical assembly; and a reflector coupled to the light source; the reflector and the light source being designed and coupled to concentrate the light beam substantially at a work point substantially coincident with the focal point of the optical assembly; and the light source being defined by a short-arc lamp to project a light bar.
Claims20
A stage lighting fixture comprising:
- a casing having a closed first end and an open second end;
- a short arc lamp which is housed inside the casing, close to the first end, and which emits a light beam along an optical axis;
- a reflector coupled to the light source;
- an output optical assembly positioned to intercept the light beam, and having a focal point located between the short arc lamp and the optical assembly;
- the reflector and the short arc lamp being designed and coupled to concentrate the light beam substantially at a work point substantially coincident with the focal point of the output optical assembly;
- and
- processing means, which are configured to process the light beam and are located between the light source and the optical assembly;
- the processing means comprising at least one light beam processing element being located substantially at the work point.
(canceled)
(canceled)
A stage lighting fixture comprising:
- a casing having a closed first end and an open second end;
- a short arc lamp which is housed inside the casing, close to the first end, and which emits a light beam along an optical axis;
- a reflector coupled to the light source;
- and
- an output optical assembly positioned to intercept the light beam, and having a focal point located between the light source and the optical assembly;
- the reflector and the light source being designed and coupled to concentrate the light beam substantially at a work point substantially coincident with the focal point of the output optical assembly so as to emit a sharp, substantially cylindrical ‘light bar’ intended to as a narrow, aligned, well defined, highly concentrated light beam.
A stage lighting fixture comprising:
- a casing having a closed first end and an open second end;
- a short arc lamp which is housed inside the casing, close to the first end, and which emits a light beam along an optical axis;
- a reflector, which is coupled to the short-arc lamp to direct the light beam along an optical axis;
- is shaped and spaced apart from the short-arc lamp to concentrate the light beam substantially at a work point located along the optical axis;
- and
- an output optical assembly, which is located at the second end of the casing, is configured to have a focal point located along the optical axis, and is spaced apart from the short-arc lamp so that the focal point coincides with the work point;
- wherein the optical assembly comprises a biconcave first lens (L1), a biconvex second lens (L2), a biconvex third lens (L3), and a frame supporting the first, second and third lenses (L1, L2, L3), whereas the second lens (L2) and the third lens (L3) are spaced apart by a distance, preferably of roughly 1 mm;
- wherein the first, second and third lenses (L1, L2, L3) are provided with the following characteristics, where the terms ‘face a’ refers to the beam entry face, and ‘face b’ to the beam exit face of the respective lens:
- RADIUS OF
- LENS
- CURVATURE
- THICKNESS
- DIAMETER
- L1 face a
- 201.037
- 5
- 108
- L1 face b
- 150.063
- 108
- L2 face a
- 150.063
- 30.700
- 108
- L2 face b
- 86.321
- 108
- L3 face a
- 249.812
- 19.30
- 130
- L3 face b
- 249.812
- 130
Dependencies are inferred from the claim text.