Safety confirmation mirror

• US 9,201,177 B2
• Filed: 10/13/2011
• Issued: 12/01/2015
• Est. Priority Date: 10/20/2010
• Status: Active Grant

• Current Assignee: Komy Co., Ltd
• Original Assignee: Komy Co., Ltd
• Inventors: Komiyama, Sakae, Nishiyama, Hiroshi, Machida, Katsumi, Takeda, Hisanaga, Iwata, Yoshiyuki
• Primary Examiner(s): Allen, Stephone B
• Assistant Examiner(s): Abdur, Rahman
• Application Number:
  US13/877,723
• Publication Number:
  US 20130194686A1
• Time in Patent Office: 1,510 Days
• Field of Search: 359/844, 359/850, 359/851, 359/861, 359/868
• US Class Current: 1/1
• CPC Class Codes: G02B 5/09 Multifaceted or polygonal mirrors , e.g. polygonal scanning mirrors; Fresnel mirrors
• CPC Class Codes: G02B 5/1861 Reflection gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence
• CPC Class Codes: G02B 5/1876 Diffractive Fresnel lenses; Zone plates; Kinoforms G02B5/1842, G02B5/1847 take precedence; optical systems having diffractive correction means G02B27/0037; Fresnel lenses operating by refraction G02B3/08

Abstract

Provided is a safety confirmation mirror whereby a blind spot near a corner of a passageway can be easily seen more clearly. The safety confirmation mirror includes, as a reflective surface (2), a portion of a Fresnel mirror (3) offset to one side of the widthwise center (C1). Accordingly, when the safety confirmation mirror is installed on a wall surface of a passageway at a T-shaped, L-shaped, or cross intersection, the reflective surface 2 reflects the blind spot of a passageway in one direction that a person is going to turn, and the person can see the conditions thereof. Moreover, the reflective surface 2 does not reflect the conditions in the unnecessary direction. Accordingly, the person looking at the safety confirmation mirror (1) is not confused by the unnecessary image and can easily see the blind spot near the corner of the passageway more clearly.

Claims

1. An installation structure of a safety confirmation mirror at an indoor T-shaped intersection, in which a front end of a passageway is connected to a side of another passageway crossing the front of the passageway, which comprises:

a pair of Fresnel mirrors which is installed on a wall surface of the side of the other passageway separately to each side of right and left in relation to the widthwise center of the passageway;

wherein

each of the pair of the Fresnel mirrors has a reflective surface in which a widthwise center of each concentric circle in the Fresnel mirrors is offset towards an opposite-side edge from one side edge;

the distance between the opposite-side edge of the reflective surface and the widthwise center of the each of the Fresnel mirrors is not more than 100 mm; and

the pair of the Fresnel mirrors are installed so that each of the opposite-side edges is opposite each other and located closer to the widthwise center of the passageway than to each of the one side edges.

2. The safety confirmation mirror system according to claim 1, wherein the opposite-side edges of the reflective surfaces coincide with the widthwise center of the Fresnel mirrors.

3. The safety confirmation mirror system according to claim 1, further comprising a display portion provided on a front surface of the Fresnel mirrors, and configured to indicate a direction of the one-side edges of the reflective surfaces.

4. The safety confirmation mirror system according to claim 3, wherein the display portions include an arrow.

5. The safety confirmation mirror system according to claim 1, further comprising a display portion provided on a front surface of the Fresnel mirrors, and configured to show an alert.