Actuator motion control mechanism for a concave mirror

• US 9,285,516 B2
• Filed: 08/02/2010
• Issued: 03/15/2016
• Est. Priority Date: 08/02/2010
• Status: Active Grant

• Current Assignee: Avinash Girish Bhardwaj
• Original Assignee: Avinash Girish Bhardwaj
• Inventors: Bhardwaj, Avinash Girish
• Primary Examiner(s): CHERRY, EUNCHA P
• Application Number:
  US12/848,288
• Publication Number:
  US 20120026614A1
• Time in Patent Office: 2,052 Days
• Field of Search: 3592231-2261, 359/846, 359/871, 359/872
• US Class Current: 1/1
• CPC Class Codes: G02B 26/0825 the reflecting element being a flexible sheet or membrane, e.g. for varying the focus flexible mirrors for cosmetic use A45D42/24
• CPC Class Codes: G02B 5/10 with curved faces

Abstract

A method for varying a radius of curvature of a concave mirror includes coupling a concave mirror to a mirror frame, coupling the mirror frame to a vertical slide, coupling the vertical slide to a horizontal slide, coupling the horizontal slide to a fixed support, coupling an end of the mirror frame to an actuator, coupling a first proximity sensor to the mirror frame, coupling a second proximity sensor to the horizontal slide, and coupling a third proximity sensor to the vertical slide. The method also includes translating the mirror frame along the vertical slide and translating the vertical slide along the horizontal slide to facilitate aligning a pole of the concave mirror with a center of an object, and varying the radius of curvature of the concave mirror to magnify an image of an object in the concave mirror for optimum clarity.

Claims

1. A method for varying a radius of curvature of a concave mirror to magnify an image of an object in the concave mirror for optimum clarity, said method comprising:

coupling a first proximity sensor to a first portion of a mirror frame;

coupling the concave mirror to the first portion of the mirror frame;

measuring an axial displacement of the object from a pole of the concave mirror using the first proximity sensor; and

varying the radius of curvature of the concave mirror as a function of the axial displacement of the object from the pole of the concave mirror to magnify the image of the object in the concave mirror for optimum clarity.

2. A method in accordance with claim 1 further comprising:

coupling a second portion of the mirror frame to the first portion of the mirror frame;

coupling the second portion of the mirror frame to a vertical slide; and

coupling the vertical slide to a horizontal slide.

3. A method in accordance with claim 2 further comprising coupling the horizontal slide to a fixed support.

4. A method in accordance with claim 2 further comprising:

coupling a second proximity sensor to the horizontal slide; and

coupling a third proximity sensor to the vertical slide.

5. A method in accordance with claim 4 further comprising:

measuring a horizontal displacement of a center of the object from the pole of the concave mirror using the second proximity sensor; and

measuring a vertical displacement of a center of the object from the pole of the concave mirror using the third proximity sensor.

6. A method in accordance with claim 2 further comprising:

coupling a first actuator to an end of the first portion of the mirror frame to vary a circumferential length of the first portion of the mirror frame;

coupling a second actuator between the second portion of the mirror frame and rails formed in the vertical slide to actuate the second portion of the mirror frame along the vertical slide; and

coupling a third actuator between the vertical slide and rails formed in the horizontal slide to actuate the vertical slide along the horizontal slide.

7. A method in accordance with claim 6 further comprising:

actuating the second portion of the mirror frame along the vertical slide using the second actuator to facilitate aligning a center of the object with the pole of the concave mirror; and

actuating the vertical slide along the horizontal slide using the third actuator to facilitate aligning a center of the object with the pole of the concave mirror.

8. A concave frame and mirror assembly for varying a radius of curvature of a concave mirror to magnify an image of an object in said concave mirror for optimum clarity, said concave frame and mirror assembly comprising:

a mirror frame comprising a first portion and a second portion, the second portion coupled to the first portion of said mirror frame;

an actuator coupled to an end of the first portion of said mirror frame, said actuator configured to vary a circumferential length of the first portion of said mirror frame;

a concave mirror coupled to the first portion of said mirror frame, the first portion of said mirror frame configured to vary a radius of curvature of said concave mirror to magnify an image of said object in said concave mirror for optimum clarity; and

a first proximity sensor coupled to the first portion of said mirror frame, said first proximity sensor configured to measure an axial displacement of said object from a pole of said concave mirror.

9. A concave frame and mirror assembly in accordance with claim 8 wherein the first portion and the second portion of said mirror frame are formed from a substantially resilient material.

10. A concave frame and mirror assembly in accordance with claim 8 wherein said concave mirror is formed from a substantially resilient material.

11. A concave frame and mirror assembly in accordance with claim 8 wherein said concave mirror is coupled to the first portion of said mirror frame by coupling said concave mirror within a groove formed in the first portion of said mirror frame.

12. A concave frame and mirror assembly in accordance with claim 8 wherein the second portion of said mirror frame is formed as a U-shaped structural member.

13. A concave mirror assembly for varying a radius of curvature of a concave mirror, said concave mirror assembly comprising:

a mirror frame comprising a first portion and a second portion coupled to the first portion, the second portion of said mirror frame coupled to a vertical slide;

a horizontal slide coupled to said vertical slide;

a fixed support coupled to said horizontal slide;

a first actuator coupled to an end of the first portion of said mirror frame, said first actuator configured to vary a circumferential length of the first portion of said mirror frame; and

a concave mirror coupled to the first portion of said mirror frame, the first portion of said mirror frame configured to vary a radius of curvature of said concave mirror to magnify an image of an object in said concave mirror for optimum clarity.

14. A concave mirror assembly in accordance with claim 13 further comprising:

a first proximity sensor coupled to the first portion of said mirror frame, said first proximity sensor configured to measure an axial displacement of said object from a pole of said concave mirror;

a second proximity sensor coupled to said horizontal slide, said second proximity sensor configured to measure a horizontal displacement of a center of said object from the pole of said concave mirror; and

a third proximity sensor coupled to said vertical slide, said third proximity sensor configured to measure a vertical displacement of a center of said object from the pole of said concave mirror.

15. A concave mirror assembly in accordance with claim 13 further comprising:

a second actuator coupled between the second portion of said mirror frame and rails formed in said vertical slide, said second actuator configured to actuate the second portion of said mirror frame along said vertical slide; and

a third actuator coupled between said vertical slide and rails formed in said horizontal slide, said third actuator configured to actuate said vertical slide along said horizontal slide.

16. A concave mirror assembly in accordance with claim 13 wherein the first portion and the second portion of said mirror frame are formed from a substantially resilient material.

17. A concave mirror assembly in accordance with claim 13 wherein said concave mirror is formed from a substantially resilient material.

18. A concave mirror assembly in accordance with claim 13 wherein said concave mirror is coupled to the first portion of said mirror frame by coupling said concave mirror within a groove formed in the first portion of said mirror frame.