Sima XL-12 Especificações descarregar pdf (Página 31)

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PHOTO - VIDEO - PRO AUDIO

ELECTRIC SCREENS

DRAPER

PROJECTION SCREEN SURFACES

368

Textile Backed Screen Surfaces

In this group, the reflective surface is laminated to a woven textile base. The screen surface hangs suitably flat because of

the stability of the material and the weight of the bottom dowel. Good for all types of projection. Commonly used for sin-

gle lens video projection, as well as for CRT video and data-graphics projection

Fiberglass Matte White: The standard to which all other screen surfaces

are compared. Matte white vinyl reflective surface laminated to tear-

resistant woven fiberglass. It diffuses projected light in all directions, so the

image can be seen from any angle. It provides accurate color rendition as

well as superior clarity. Recommended for use with all high light output

projection devices. Requires control of ambient light in the audience area.

Seamless in all standard sizes through 10’ high.

Glass Beaded: Spherical glass beads embedded in surface provide brighter

on-axis viewing than matt white, within a narrower viewing cone. All glass

beaded surfaces have some loss of clarity and perform best with

table-mounted projectors. Flame and mildew resistant; it cannot be

cleaned. Seamless in all standard sizes through 10’ high.

High Contrast Grey: Grey textile-backed surface offers excellent resolution

while enhancing the blacks of LCD and DLP projected images, even as

whites and lighter colors are maintained. Performs well in ambient light.

Lower gain of 0.8 allows use with even the brightest projectors. Viewing

cone of 180°.

AT1200: The most innovative and versatile acoustically transparent screen

material. Similar in gain performance to standard matte white. Acoustical

properties are comparable to the finest speaker grille cloth. Washable, flame

and mildew resistant. Available in sizes through 72” x 96” or 10’ diagonal.

AT Grey: Offers the acoustical properties of AT1200, while providing the

best optical qualities of both Matte White and High Contrast Grey. It offers

both a 180° viewing cone and vivid color contrast.

100% Vinyl Screen Materials

These screen surfaces are tensioned vinyl with no backing. Draper offers motorized, crank-operated and permanently

tensioned screens with built-in tensioning systems. The surface is stretched perfectly flat, resulting in better picture quality.

Flatness is always desirable, particularly for video or data-graphics projection.

HiDef Grey: A grey front projection surface that provides greater contrast

and black reproduction than standard surfaces, with a lower gain to handle

today's super-bright projectors. The grey color enhances color contrast and

black levels in the projected image and also allows for more ambient light

in the audience area than traditional surfaces. Available on all tab-tensioned

and permanently tensioned screens, in sizes through 96” x 96”, or 6’ high in

greater widths.

M1300: The perfect matt white diffusing surface. Extremely broad light dis-

persion and spectral uniformity. Panoramic viewing angle and true color

rendition. Recommended for use with any type of projector in rooms where

the light level can be reasonably controlled. Washable.

M2500: A high-contrast front viewing surface, with excellent resolution and

high gain. For data-graphics projectors producing through 1000 ANSI

lumens. It tolerates a higher ambient light level than most other front pro-

jection screen surfaces.

Cineflex: A neutral grey vinyl for rear projection. Cineflex has high resolu-

tion and excellent contrast, even in lighted rooms. For use with any type of

projection equipment.

Flexible Matte White: Pliable matte white material for use in portable fold-

ing screens. It can be stretched, folded and restretched repeatedly without

damage. It has a gain of 1.0 and a viewing cone of 180°.

When selecting a front projection surface, several key factors need to be considered, including:

Gain - a relative measure of a screen’s reflectivity;

Contrast - the ability to accurately reproduce and

differentiate light and dark characters and backgrounds,

or light and dark areas of an image;

Ambient light rejection properties - the ability to perform

well under normal to adverse lighting conditions in the

audience area;

Resolution - the clarity of the projected image;

Uniformity - the screen’s performance when viewed from

various points off the projection axis, and when comparing

the brightness of the center of the image to the corners;

Aspect Ratio - the screen’s height and width, formatted for

the desired projection source (NTSC video, HDTV,

WideScreen, overhead, slide or motion pictures).

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