BARN DOOR [Film Technology]

BARN DOOR
[Film Technology]

Barn doors in front of the lights help further in narrowing the beam by masking of the light. Adjustable mask of barn door consisting of hinged flaps which can be opened on closed in front of studio lamps to restrict the edge of the beam and control spill light. This comprises from one to four hinged flaps, attached to frame the slips in front of the spotlight housing.

1)  To restrict light to specific lighting areas.

2)  To light specific positions (actors, furniture or scenery)

3)  To light people while leaving near by walls unlit or shaded.

4)  To light walls (scenery) while leaving nearby people unlit.

5)  To shade off light casting unwanted shadow or ugly shadows from scenery , people, sound booms, practicals etc..

6)  To provide isolated light patches (e.g. around practicals).

7)  To create atmospheric light streaks (e.g. sunlight shaft on walls).

8)  To create shading areas.

9)  To avoid duplication of light (overlapping of adjacent lamp beams).

10)      To resist illumination of light toned surfaces (preventing their being over lit).

11)      To prevent a light beam spuriously streaking along a parallel wall.

12)      To prevent back light from creating lens flares. 

The barn door comprises up to four independently hinged adjustable metal flaps on a rotatable frame [rotating barn door]. These allow selected beam cutoff.  Long barn doors, short barn doors used individually or in combination, various straight or rectangular restrictions can be formed. Progressively boxed in for much localized use and rotated for rectangular restrictions. Typical examples of barn door use are shown-

Horizontal shading-long doors only.

Subject isolation- tightly boxed-in.

Localized shading- boxed-in.

Lighting into an angle, beam shape becomes distorted. 

e-mail : pratheepvasudev@gmail.com