| 摘要 |
PROBLEM TO BE SOLVED: To provide a fine control variable mask device in an illuminator, etc., which can reliably form a desired contour and facilitates the fine control operation of an illumination area for reliably maintaining an established contour by performing fine turning movement and sliding control of a variable mask plate, when clearly illuminating pictures, display boards, etc., outdoors or in an exhibition hall. SOLUTION: This fine control variable mask device in this illuminator, etc., provides a support frame 20 consisting of substrates providing an aperture 24 for light projection and pressure spring plates between a light source and a projection lens of the illuminator, etc. Mask guide planes and adjustment member guide planes are mounted on a substrates 21. Adjustment members 30 are accommodated, hawing adjusting screws 36 in adjustment member guides 28, rotatably around rotation fulcrums 32 and provided with mask plates 40 which moves back and forth engaged with the adjusting screws 36. The contour of an illuminated brightness area is variably fine controlled by movingly controlling the mask plates 40 along the mask guide plane under the pressure of the spring plates. |
