ISO 11315-2:1997

Photography — Projection in indoor rooms — Part 2: Screen luminance test for still and video projection

Specifies the measurement of screen luminance level, as seen by a (seated) viewer for all types of purely optical still projection in darkened projection rooms. Since the optical characteristics of the surface of this screen have a direct bearing on luminance, the screen shall be considered an integral part of the projection system for this part of ISO 11315. A standardized light-measuring system allows comparison of screen luminance values for different projection systems used alternately in practical use.

Photographie — Projection en salles — Partie 2: Essai de luminance de l'écran pour projection fixe et vidéo

Fotografija - Projekcija v zaprtih prostorih - 2. del: Preskus zaslonske svetlosti (luminance) za projekcijo mirujočih in gibljivih slik

Določa merjenje ravni zaslonske svetlosti, kot jo vidi (sedeči) opazovalec, za vse vrste popolnoma optičnih projekcij mirujočih slik v zatemnjenih prostorih za projekcijo. Ker imajo optične lastnosti površine tega zaslona neposreden vpliv na svetlost, v tem delu ISO 11315 zaslon šteje za sestavni del projekcijskega sistema. Standardizirani sistem za merjenje svetlobe omogoča primerjavo vrednosti svetlosti zaslona pri različnih projekcijskih sistemih, ki se izmenično uporabljajo pri praktični uporabi.

General Information

• Status: Published
• Publication Date: 12-Nov-1997
• ICS: 37.040.10 - Photographic equipment. Projectors
• Technical Committee: ISO/TC 42 - Photography
• Drafting Committee: ISO/TC 42 - Photography
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 05-Jun-2023
• Ref Project: SIST ISO 11315-2:2011 - Photography - Projection in indoor rooms - Part 2: Screen luminance test for still and video projection

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 11315-2
First edition
1997-11-15
Photography — Projection in indoor
rooms —
Part 2:
Screen luminance test for still and video
projection
Photographie — Projection en salles —
Partie 2: Essai de luminance de l'écran pour projection fixe et vidéo
A
Reference number
ISO 11315-2:1997(E)

---------------------- Page: 1 ----------------------
ISO 11315-2:1997(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be represented
on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 11315-2 was prepared by Technical Committee
ISO/TC 42, Photography.
ISO 11315 consists of the following parts, under the general title
Photography — Projection in indoor rooms:
— Part 1: Screen illumination test for still projectors
— Part 2: Screen luminance test for still and video projection
— Part 3: Projection reflecting screens
— Part 4: Reflecting projection screens — Classification and
measurement of reflected screen luminance levels and sound
attenuation
Annexes A and B of this part of ISO 11315 are for information only.
©  ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

---------------------- Page: 2 ----------------------
©
INTERNATIONAL STANDARD  ISO ISO 11315-2:1997(E)
Photography — Projection in indoor rooms —
Part 2:
Screen luminance test for still and video projection
1 Scope
This part of ISO 11315 specifies the measurement of screen luminance level, as seen by a
(seated) viewer for all types of purely optical still projection in darkened projection rooms. Since
the optical characteristics of the surface of this screen have a direct bearing on luminance, the
screen shall be considered an integral part of the projection system for this part of ISO 11315.
A standardized light-measuring system allows comparison of screen luminance values for
different projection systems used alternately in practical use.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this part of 11315. At the time of publication, the editions indicated were valid. All
standards are subject to revision, and parties to agreements based on this part of ISO 11315
are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 2910:1990, Cinematography - Screen luminance for the projection of motion-
picture prints in indoor theatres and review rooms.
ISO 11315-1:1997, Photography - Projection in indoor rooms - Part 1: Screen
illumination test for still projectors.
CIE No. 15.2:1986, Colorimetry (2nd edition).
CIE No. 69:1987, Methods of Characterizing Illuminance Meters and Luminance
Meters - Performance, Characteristics and Specifications.
1

---------------------- Page: 3 ----------------------
©
ISO
ISO 11315-2:1997(E)
3 Definitions
For the purposes of this part of ISO 11315, the following definitions apply.
3.1 luminance: The quotient of the flux leaving, arriving at or passing through an element of
surface and propagated in directions defined by an elementary cone containing the given
direction by the product of solid angle of the cone and the area of the orthogonal projection of
the element of surface on a plane perpendicular to the given direction.
[CIE-Publ. No. 17]
3.2 screen: A light-reflecting or light-transmitting surface with defined optical properties for the
purpose of projection. In this part of ISO 11315, screen means the screen-picture area of the
complete installed projection screen only appropriate to the print format (slide) and projection
system in use.
3.3 theatrical projection: An indoor public projection system (e.g. in multi-purpose halls,
auditoriums of universities, cinemas, etc.)
3.4 viewing area: A limited area for the — preferably seated — viewers. It allows good viewing
conditions independent of the relative dimensions of the projection screen area. (See annex A,
A.5.)
3.5 still projection: All projection methods with one or more projectors for slides, overhead-
projection transparencies, episcopic pictures for projection and transparent LCDs.
3.6 uniformity ratio, g : The ratio of the lowest measured illuminance/luminance to the highest
2
measured illuminance/luminance, e.g. L /L (x 100 in %).
min max
[CIE-Publ. No. 17]
4 Test method for determining the screen luminance
The distribution of luminance over the screen surface from a complete projection installation
(i.e. including projector and screen in a projection room) is influenced by impinging light
generated by the projector (not by room lighting), and the properties of the screen.
The luminance towards the viewing area is directly dependent on the angle of the reflected (or
transmitted) light by the screen surface as well as on the viewing position. It is expressed as a
curve by the luminance factor indicatrix (see note below). To achieve this, the luminance
distribution shall be determined at three test points (see figure 1) for three selected viewing
positions.
NOTE —  The luminance factor indicatrix will be covered in ISO 11315-4 which is being prepared.
2

---------------------- Page: 4 ----------------------
©
ISO
ISO 11315-2:1997(E)
Key
w Width of the projected image
h Height of the projected image
NOTE —  The final location of relevant test points is determined by the screen ratio actually used during projection.
Figure 1 - Location of the test points (1 - 2 - 3) on the screen
Luminance shall be measured from three positions of the measuring device in the viewing area
(see figure 2, B-A-C) to three test points (1 - 2 - 3) on the screen.
5 Measurement of screen luminance
5.1 Preconditioning
The preparation procedure shall be the same as for the measurement of screen illumination
according to ISO 11315-1:1997, subclause 4.1.
5.2 Measuring device
The screen luminance shall be measured with a luminance meter having a recommended field
angle not greater than 1,5° and the spectral sensitivity of a Standard Colorimetric Observer
(CIE-Publ. No. 15.2).
The measuring inaccuracy shall not exceed ± 10 %. The luminance meter shall comply with the
requirements of class B (CIE-Publ. No. 69).
3

---------------------- Page: 5 ----------------------
©
ISO
ISO 11315-2:1997(E)
Key
w Screen width
x Distance from screen to last row of seats
B-A-C Position of measuring device
R Last row of seating
Figure 2 - Position of measuring device in viewing area
5.3 Position of measuring device in the viewing area
The measurements shall be taken with the luminance meter located approximately 1 m above
the floor on the longitudinal axis of the projection room in the centre of the main seating area
and at a position 2/3 of the distance from the screen to the last row of seats. To ensure
satisfactory performance in all parts of the projection room, measurements shall also be taken
with the luminance meter located approximately 1 m above the floor at two points on a
transverse line across the projection room, at a position 2/3 of the distance from the screen to
the last row of seats (meas
...

SLOVENSKI STANDARD
SIST ISO 11315-2:2011
01-julij-2011
)RWRJUDILMD3URMHNFLMDY]DSUWLKSURVWRULKGHO3UHVNXV]DVORQVNHVYHWORVWL
OXPLQDQFH]DSURMHNFLMRPLUXMRþLKLQJLEOMLYLKVOLN
Photography - Projection in indoor rooms - Part 2: Screen luminance test for still and
video projection
Photographie - Projection en salles - Partie 2: Essai de luminance de l'écran pour
projection fixe et vidéo
Ta slovenski standard je istoveten z: ISO 11315-2:1997
ICS:
37.040.10 Fotografska oprema. Photographic equipment.
Projektorji Projectors
SIST ISO 11315-2:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 11315-2:2011

---------------------- Page: 2 ----------------------

SIST ISO 11315-2:2011
INTERNATIONAL ISO
STANDARD 11315-2
First edition
1997-11-15
Photography — Projection in indoor
rooms —
Part 2:
Screen luminance test for still and video
projection
Photographie — Projection en salles —
Partie 2: Essai de luminance de l'écran pour projection fixe et vidéo
A
Reference number
ISO 11315-2:1997(E)

---------------------- Page: 3 ----------------------

SIST ISO 11315-2:2011
ISO 11315-2:1997(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national standards bodies (ISO member bodies). The work of
preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be represented
on that committee. International organizations, governmental and non-
governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 11315-2 was prepared by Technical Committee
ISO/TC 42, Photography.
ISO 11315 consists of the following parts, under the general title
Photography — Projection in indoor rooms:
— Part 1: Screen illumination test for still projectors
— Part 2: Screen luminance test for still and video projection
— Part 3: Projection reflecting screens
— Part 4: Reflecting projection screens — Classification and
measurement of reflected screen luminance levels and sound
attenuation
Annexes A and B of this part of ISO 11315 are for information only.
©  ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

---------------------- Page: 4 ----------------------

SIST ISO 11315-2:2011
©
INTERNATIONAL STANDARD  ISO ISO 11315-2:1997(E)
Photography — Projection in indoor rooms —
Part 2:
Screen luminance test for still and video projection
1 Scope
This part of ISO 11315 specifies the measurement of screen luminance level, as seen by a
(seated) viewer for all types of purely optical still projection in darkened projection rooms. Since
the optical characteristics of the surface of this screen have a direct bearing on luminance, the
screen shall be considered an integral part of the projection system for this part of ISO 11315.
A standardized light-measuring system allows comparison of screen luminance values for
different projection systems used alternately in practical use.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute
provisions of this part of 11315. At the time of publication, the editions indicated were valid. All
standards are subject to revision, and parties to agreements based on this part of ISO 11315
are encouraged to investigate the possibility of applying the most recent editions of the
standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 2910:1990, Cinematography - Screen luminance for the projection of motion-
picture prints in indoor theatres and review rooms.
ISO 11315-1:1997, Photography - Projection in indoor rooms - Part 1: Screen
illumination test for still projectors.
CIE No. 15.2:1986, Colorimetry (2nd edition).
CIE No. 69:1987, Methods of Characterizing Illuminance Meters and Luminance
Meters - Performance, Characteristics and Specifications.
1

---------------------- Page: 5 ----------------------

SIST ISO 11315-2:2011
©
ISO
ISO 11315-2:1997(E)
3 Definitions
For the purposes of this part of ISO 11315, the following definitions apply.
3.1 luminance: The quotient of the flux leaving, arriving at or passing through an element of
surface and propagated in directions defined by an elementary cone containing the given
direction by the product of solid angle of the cone and the area of the orthogonal projection of
the element of surface on a plane perpendicular to the given direction.
[CIE-Publ. No. 17]
3.2 screen: A light-reflecting or light-transmitting surface with defined optical properties for the
purpose of projection. In this part of ISO 11315, screen means the screen-picture area of the
complete installed projection screen only appropriate to the print format (slide) and projection
system in use.
3.3 theatrical projection: An indoor public projection system (e.g. in multi-purpose halls,
auditoriums of universities, cinemas, etc.)
3.4 viewing area: A limited area for the — preferably seated — viewers. It allows good viewing
conditions independent of the relative dimensions of the projection screen area. (See annex A,
A.5.)
3.5 still projection: All projection methods with one or more projectors for slides, overhead-
projection transparencies, episcopic pictures for projection and transparent LCDs.
3.6 uniformity ratio, g : The ratio of the lowest measured illuminance/luminance to the highest
2
measured illuminance/luminance, e.g. L /L (x 100 in %).
min max
[CIE-Publ. No. 17]
4 Test method for determining the screen luminance
The distribution of luminance over the screen surface from a complete projection installation
(i.e. including projector and screen in a projection room) is influenced by impinging light
generated by the projector (not by room lighting), and the properties of the screen.
The luminance towards the viewing area is directly dependent on the angle of the reflected (or
transmitted) light by the screen surface as well as on the viewing position. It is expressed as a
curve by the luminance factor indicatrix (see note below). To achieve this, the luminance
distribution shall be determined at three test points (see figure 1) for three selected viewing
positions.
NOTE —  The luminance factor indicatrix will be covered in ISO 11315-4 which is being prepared.
2

---------------------- Page: 6 ----------------------

SIST ISO 11315-2:2011
©
ISO
ISO 11315-2:1997(E)
Key
w Width of the projected image
h Height of the projected image
NOTE —  The final location of relevant test points is determined by the screen ratio actually used during projection.
Figure 1 - Location of the test points (1 - 2 - 3) on the screen
Luminance shall be measured from three positions of the measuring device in the viewing area
(see figure 2, B-A-C) to three test points (1 - 2 - 3) on the screen.
5 Measurement of screen luminance
5.1 Preconditioning
The preparation procedure shall be the same as for the measurement of screen illumination
according to ISO 11315-1:1997, subclause 4.1.
5.2 Measuring device
The screen luminance shall be measured with a luminance meter having a recommended field
angle not greater than 1,5° and the spectral sensitivity of a Standard Colorimetric Observer
(CIE-Publ. No. 15.2).
The measuring inaccuracy shall not exceed ± 10 %. The luminance meter shall comply with the
requirements of class B (CIE-Publ. No. 69).
3

---------------------- Page: 7 ----------------------

SIST ISO 11315-2:2011
©
ISO
ISO 11315-2:1997(E)
Key
w Screen width
x Distance from screen to last row of seats
B-A-C Position of measuring device
R Last row of seating
Figure 2 - Position of measuring device in viewing area
5.3 Position of measuring device in the viewing area
The me
...