Patent ID: 8049860
Filing Date: 2011-11-01
Classification: B65G,C03B,C09K,G02B,G02F,G03B,Y02P

Abstract:
1. A glass substrate for a reflective mirror, wherein: in a measurement condition of a cut-off value of 0.8 to 8 mm, a maximum amplitude of a filtered waviness curve is 0.1 μm or less, a maximum value of a viewability index value γ expressed by the following formula (1) in a range of spatial frequencies of 2 to 500/mm by spectral analysis of said filtered waviness curve is 0.02 (/m (where A represents each amplitude (m) in a range of spatial frequencies of 2 to 500/mm, and D represents each period (m) in a range of spatial frequencies of 2 to 500/mm), and an integral value of said viewability index value γ is 2.0 (/m