View expanding apparatus

• US 4,187,001 A
• Filed: 11/07/1977
• Issued: 02/05/1980
• Est. Priority Date: 01/10/1977
• Status: Expired due to Term

• Current Assignee: Redwitz Baker Incorporated
• Original Assignee: Redwitz Baker Incorporated
• Inventors: Baker, William G., Redwitz, Robert F.
• Primary Examiner(s): Sacher, Paul A.
• Application Number:
  US05/848,833
• Time in Patent Office: 820 Days
• Field of Search: 350/202, 350/211, 350/307, 350/302, 16/137
• US Class Current: 359/726
• CPC Class Codes: B60R 1/10 Front-view mirror arrangements; specially adapted for covering the peripheral part of the vehicle B60R1/002; Periscope arrangements , i.e. optical devices using combinations of mirrors, lenses, prisms or the like specially adapted for covering the peripheral part of the vehicle B60R1/002; for viewing traffic-lights B60R1/005; Other mirror arrangements giving a view from above or under the vehicle
• CPC Class Codes: G02B 27/02 Viewing or reading apparatus stereoscopic systems G02B30/00

Abstract

A view expanding apparatus mounted on the inside lower right hand corner of an automobile windshield for eliminating the blind spot in the rear view of a motorist. A mirror is pivotally coupled to a negative lens, which may be a Fresnel lens, and the mirror lens construction is secured to the inside of the windshield. The negative lens expands the field of view and the angle between the lens and the mirror is adjustable so that the mirror reflects the expanded field of view for observation by the driver.

Claims

1. A view expanding apparatus comprising:

a lens having a negative focal length for providing an expanded field of view,

a mirror secured to one edge of said lens and angularly displaced therefrom, said mirror having a reflecting surface for reflecting the expanded field of view,

arm members including means for mounting said apparatus on a surface, and

a pin, said lens, said mirror and said arm members being secured to said pin for pivoting relative to each other about said pin, said securing providing adjustability of said angular displacement.

2. The apparatus as described in claim 1 and wherein said lens has a first surface and a second surface and said second surface faces said reflecting surface of said mirror.

3. The apparatus as described in claim 2 and wherein said first surface is concave and said second surface is flat.

4. The apparatus as described in claim 2 and wherein said first and second surfaces are concave.

14. The method as described in claim 1 and wherein one edge of said Fresnel lens is pivotally secured to an edge of said mirror whereby said Fresnel lens and said mirror have an adjustable angle therebetween.

5. A system for expanding the side and rear view of a vehicle driver comprising:

a lens having a negative focal length for providing an expanded side and rear view,

a mirror having a reflecting surface for reflecting the expanded view in the direction of the driver to enable the driver to observe the expanded view,

securing means for securing one edge of said lens to one edge of said mirror at an angular displacement therefrom,

arm members connected to said securing means for mounting said system to the interior of the windshield of the vehicle,

said securing means including pin means, said lens, said mirror and said arm members being secured to said pin means for pivoting relative to each other about said pin means, said securing providing adjustability of said angular displacement.

6. A method of expanding the side and rear view of a driver of a vehicle comprising the steps of:

mounting a lens having a negative focal length inside the vehicle near the lower right hand corner of the windshield for providing an expanded view to the rear along the side of the vehicle away from the driver, and

reflecting the expanded view transmitted by said lens to the driver using a single mirror, inside the vehicle.

7. The method as described in claim 6 and wherein said mounting of said lens is on the windshield of the vehicle.

8. The method as described in claim 7 and wherein said lens has a first surface and a second surface and one edge of said lens is pivotally secured to an edge of said mirror whereby said second surface of said lens and the reflecting surface of the mirror face each other at an adjustable angle.

9. The method as described in claim 8 and wherein said first surface is concave and said second surface is flat.

10. The method as described in claim 8 and wherein said first and second surfaces are concave.

11. The method as described in claim 6 and wherein one edge of said lens is pivotally secured to an edge of said mirror whereby said lens and said mirror have an adjustable angle therebetween.

12. A view expanding apparatus comprising:

a Fresnel lens having a negative focal length for providing an expanded field of view,

a mirror secured to one edge of said Fresnel lens and angularly displaced therefrom, said mirror having a reflecting surface for reflecting the expanded field of view,

arm members including means for mounting said apparatus on a surface, and

a pin, said lens, said mirror and said arm members being secured to said pin for pivoting relative to each other about said pin, said securing providing adjustability of said angular displacement.

13. The apparatus as described in claim 12 and wherein said Fresnel lens has a grooved surface and a flat surface and one of said surfaces faces toward said reflecting surface of said mirror.

15. A system for expanding the side and rear view of a vehicle driver comprising:

a Fresnel lens having a negative focal length for providing an expanded side and rear view, and

a mirror having a reflecting surface for reflecting the expanded view in the direction of the driver to enable the driver to observe the expanded view,

securing means for securing one edge of said Fresnel lens to one edge of said mirror at an angular displacement therefrom,

arm members connected to said securing means for mounting said system to the interior of the windshield of the vehicle,

said securing means including pin means, said lens, said mirror and said arm members being secured to said pin means for pivoting relative to each other about said pin means, said securing providing adjustability of said angular displacement.

16. A method of expanding the side and rear view of a driver of a vehicle comprising the steps of:

mounting a Fresnel lens having a negative focal length inside the vehicle near the lower right hand corner of the windshield for providing an expanded view to the rear along the side of the vehicle away from the driver, and

reflecting the expanded view transmitted by said Fresnel lens to the driver using a single mirror, inside the vehicle.

17. The method as described in claim 16 and wherein said mounting of said Fresnel lens is on the windshield of the vehicle.

18. The method as described in claim 17 and wherein said Fresnel lens has a grooved surface and a flat surface and one edge of said Fresnel lens is pivotally secured to an edge of said mirror whereby said flat surface of said Fresnel lens and the reflecting surface of the mirror face each other at an adjustable angle.