GB/T 14148-2011Glass blank of ophthalmic lenses (English PDF)

Foreword

This standard replaces GB/T 14148-1993 "ophthalmic lens blanks." This standard and GB/T 14148-1993 compared to the main changes are as follows:

--- No technical requirements and classification, a single "qualified" technical indicators.

--- Refractive technical requirements no longer apply only to

1.523 ophthalmic lens blank, and revised as follows: n is the refractive index of tolerance ± 0.002. Technology

--- UV spectral region of GB 10810.3 required by the revised standard.

--- Material and surface quality of the technical requirements of the standard reference GB 10810.1 modification. Appendix A of this standard is a normative appendix. The standard proposed by China Machinery Industry Federation. This standard by the National Standardization Technical Committee Optics and optical instruments - Optical glasses Technical Committee (SAC/TC103/SC3) Centralized. This standard is mainly drafted by: Donghua University, the National Optical glass enamels Quality Supervision and Inspection Center. The main drafters of this standard. Zhoujun Wen, Tang Lingling. This standard replaces the standards previously issued as follows:

--- GB/T 14148-1993. Ophthalmic lens blank

1 Scope

GB/T 14148-2011 is the Chinese national standard on glass blank of ophthalmic lenses, in the field of health care technology. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 16 June 2011 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 December 2011. Classification: ICS 11.040.70, CCS Y89. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the ophthalmic lens blank product technical requirements, test methods, inspection rules and signs, bags, transport and Storage. This standard applies to the molten glass by the direct compression molding of several commonly used ophthalmic lens blank, but also for other similar products Reference.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 2828.1-2003 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch test sample Programme ( ISO 2859-1.1999, IDT)

GB 10810.3 spectacle lenses and related products - Part 3. Transmittance specifications and measurement methods ( GB 10810.3-2006, ISO 8980-3.2003, MOD)

3 Terms and Definitions

The following terms and definitions apply to this standard.

3.1 From raw materials to finished products all process requirements by optical glass melted into a type having the stable physical and chemical properties suitable for grinding glasses Blank glass spectacle lenses.

3.2 Optical white sheet clearopticallens Colorless glass lenses.

3.3 Clexane optical sheet CRUXITEopticallens Pale pink glass lenses.

3.4 Alex optical sheet CROOKESopticallens Under incandescent pale mauve, pale blue green glass lenses under the fluorescent lights, the characteristic absorption peak wavelength of 560nm ~ 600nm range.

3.5 Chipping breakofedge Lens blank in the diameter direction of the collapse loss.

3.6 Thickness difference edgethicknessdifference The thickness of the lens blank at the two ends of a diameter difference.