This document specifies the technical requirements and measurement methods for the equipment and facilities, projection building technology, projection optical system, stereoscopic projection optical system, and projection acoustic system of digital film giant screen cinemas, as well as the corresponding measurement methods. This document is applicable to the projection building process design, projection equipment configuration, testing, and quality supervision of digital film giant screen cinemas. 2 Normative References The content of the following documents constitutes an essential clause of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to that date applies to this document: for undated reference documents, the latest version (including all modification orders) applies to this document. GY/T 311-2017 Technical Requirements and Measurement Methods for Audiovisual Environment of Cinemas GY/T 312-2017 Specification and Measurement of B-Ring Electroacoustic Response in Film Recording Control Rooms and Indoor Cinemas DY/T 1-2020 Technical Requirements and Measurement Methods for Stereoscopic Projections in Digital Cinemas 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Effective image width The maximum image width that can be projected on the screen under normal projection conditions. Note: For curved screens, the effective projection width is the horizontal distance between the left and right edges of the screen. 3.2 Effective image height The maximum image height that can be projected on the screen under normal projection conditions. Note: For screens with tilt angle installation, the effective projection height is the vertical distance between the upper and lower edges of the screen
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China