Standard No.:	GB 27995.2-2011
Chinese Name:	半成品眼镜片毛坯 第2部分：渐变焦眼镜片毛坯规范
English Name:	Semi-finished spectacle lens blanks—Part 2:Specifications for progressive power lens blanks
Professional Classification:	Y89 Other daily necessaries
ICS Classification:	11.040.70 Ophthalmic equipment
Issued by:
Issued on:	2011-12-30
Implemented on:	2012-12-01
Status:	VALID
Target Language:	English
File Format:	PDF
Word Count:	6000 words
Translation Price:	180 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This part of GB 27995 specifies requirements for the optical and geometrical properties of semi-finished progressive power spectacle lens blanks.
This part is applicable to semi-finished progressive power spectacle lens blanks.
Note: The requirements for semi-finished single-vision and multifocal lens blanks are given in GB 27995.1.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the reference document (including any amendments) applies.

下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有修改单)适用于本文件。
GB17341 光学和光学仪器 焦度计
ISO13666 Ophthalmicoptics—Spectaclelenses—Vocabulary