The document discusses color correction techniques in lighting and stage design. It describes how lighting designers manipulate color through various methods, including colored lighting gels, dichroic filters, gelstrings, and automated color changers. These color correction tools allow designers to modify the perceived color of surfaces and create desired moods through lighting effects. The document also discusses how colored filters, diffusers, and roundels are used to spread, soften, and mix light for stage and photography applications.

1. Color Correction
Shaolin Shaon

2. Source:
• R. CRAIGWOLF San Diego State University
• DICk BLOCk Carnegie Mellon University
SCENE DESIGN
AND STAGE
LIGHTING,TENTH
EDITION

3. All designers are interested in color and light, but ….
lighting designersare involved
with the physics of color
scenic designers are involved
in painting and dyeing
costume designers are
involved in painting and dyeing
all three deal with
the manipulation of
colored materials.

4. • special lighting cue written and
inserted into the cue list to
cause color changers or
automated fixtures to change
their color or focus without
being seen.
Dark
Set

5. Color Mixing-Mixing occurs any time two differently
colored lights are used on the same area
• Colors of the light sources
• Direction of the light sources
• Contour of the surface being lit
• Natural color of the surface
being lit
The resulting
color
depends on
several
things:

6. Color
Reflection
Color
Modification
Color
Interaction
Color
Filtering
Color Mixing

7. Color Modification Through Light
Under white light, a colored surface such as-
• green reflects only green wavelengths and absorbs
all others.
• A red filter allows only red light to transmit, which
mixed with a green surface appears black.
• Adding a colored filter to the white light changes
our perception of the colored surface.
Principles of Lighting

8. Color ModificationThrough Light

9. Color Correction
Gels
• A short name for color
filters;
• derived from the word
gelatin
Diffusers
• Colored Glass
• Roundel
• Dichroics
• Gelstring
• Frost

10. What Are Lighting Gels?
• Lighting gels are colored,
translucent sheets of thin plastic.
• Used by Photographers,
filmmakers, and stage lighting
technicians
Translucent-(of a substance) allowing light, but not detailed shapes, to pass through;
semi-transparent.

11. Lighting Gels
• Used to correct color and lighting issues.
• Used to create various tones and moods for movies,
• Used to replicate either daytime or nighttime lighting, or
• Used to balance intensity, light temperature, and other
parameters.
7/31/2020Principles of Lighting 11

12. Necessary Links
• https://www.youtube.com/watch?v=4bOecWjjzI0&list=PL720E0A66DA1B1E37&index=16
LEE System Match: Find the
best System for your lenses
• https://www.youtube.com/watch?v=3HUg4tUpng&list=PL720E0A66DA1B1E37&index=5
LEE100 Deluxe Kit -
Unboxing in Stop-Motion
• https://www.youtube.com/watch?v=Q9f53XIsAHo&list=PL720E0A66DA1B1E37&index=6
LEE Filters - Announcing our
Next-Generation Filter
System

13. Light Diffusers-
scatter light to make it softer and more natural.
While diffusion gels consist of
plastics similar to colored gels,
fabric diffusers are also an option.
You can use fabric diffusers and
colored photography gels to lessen
the intensity of studio lights and to
introduce colors and tones for
different effects.
Diffusers reduce exposure and
soften the light in varying
measurements, known as stops.
Purchasing diffusers in various
strengths is an easy way to add
more variety to light options in
your setup.

15. Color Correction
• Colored glass filters are expensive and
break when dropped.
• It comes in few colors, is heavy, and is
bulky to store.
Colored
Glass
• it never fades
• it resists heat, and
• it can be molded like a lens in order to
spread light.
Glass does
offer three
advantages

16. Color Correction
• round glass color filters made to fit into strip lights.
Roundel
• Glass color filters that reflect rather than absorb unwanted
wavelengthsDichroics

17. Color Correction
Dichroics Roundel

18. Color Correction
• A series of plastic
color filters
taped together
and rolled to
form the scroll of
a color changer.
Gelstring

19. Automated Color Changers
• Units commonly called scrollers
• which use Gelstring: a series of
plastic colors taped together and
rolled to form a scroll
• Subtractive color mixers, which use
two scrolls mixing together to form a
unique color
There are
three basic
types of
color-
changing
accessories
available
today:

20. Lets Explore…
A more formal diffuser filter over a
camera flash, flanked by reflectors
Flash diffuser to be mounted on a
camera

21. Lets Explore…
Softbox diffuser; a larger area spreads the light
more
A lighting technician holds a reflector to diffuse
the light falling on a politician

22. Lets Explore…
A home-made lightbox, designed to produce
images with diffuse lighting from all angles Lightbox photography

23. Lets Explore…
transmitting (Softbox) and reflecting diffusors Studio lights, one white, two metallized

24. Lets Explore…
Theatrical colour magazine or boomerang.
Placed in front of a stage light, it gives quick changes in lighting gel, including a
diffusion filter
Diffuser on a camera flash.
Made from a sheet of paper, a rubber band, and two staples.

25. Gel and Diffusers Accessories
Gel Roll Gel Roll

26. Gel and Diffusers Accessories
Holder Gel Roll