Beam shaping system and scanner

• US 10,061,118 B2
• Filed: 01/27/2017
• Issued: 08/28/2018
• Est. Priority Date: 02/04/2016
• Status: Active Grant

• Current Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Original Assignee: Hand Held Products Incorporated (Honeywell International Inc.)
• Inventors: Zhang, QianAn
• Primary Examiner(s): Le, Thien M
• Application Number:
  US15/417,750
• Publication Number:
  US 20170227760A1
• Time in Patent Office: 578 Days
• Field of Search: 23546201
• CPC Class Codes: G02B 13/08 Anamorphotic objectives
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 27/0911 Anamorphotic systems
• CPC Class Codes: G02B 27/0966 Cylindrical lenses cylindrical lenses per se G02B3/06
• CPC Class Codes: G02B 3/06 with cylindrical or toric faces
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002
• CPC Class Codes: G06K 7/10831 Arrangement of optical elements, e.g. lenses, mirrors, prisms optical elements per se G02B
• CPC Class Codes: H01S 5/0071 for beam steering, e.g. using a mirror outside the cavity to change the beam direction
• CPC Class Codes: H01S 5/02212 Can-type, e.g. TO-CAN housings with emission along or parallel to symmetry axis
• CPC Class Codes: H01S 5/02253 using lenses
• CPC Class Codes: H01S 5/042 Electrical excitation ; Circuits therefor monolithically integrated laser drive components H01S5/0261

Abstract

An elongated laser beam optical assembly. The assembly has a laser light source that produces a laser beam. A cylindrical anamorphic lens has a planar surface at a first end and an anamorphic surface at a second end thereof, the first end receiving the laser beam from the laser light source and producing an output laser beam from the second end thereof. An aperture passes the output laser beam from the second end of the anamorphic lens to produce an elongated laser beam.

Claims

1. An elongated laser beam optical assembly, comprising:

a laser light source that produces a laser beam;

a cylindrical anamorphic lens having a planar surface at a first end and an anamorphic surface at a second end thereof, the first end receiving the laser beam from the laser light source and producing an output laser beam from the second end thereof; and

an aperture that passes the output laser beam from the second end of the anamorphic lens to produce an elongated laser beam;

wherein the curvature of the anamorphic surface is given by;

2. The assembly according to claim 1, further comprising a yoke that holds the assembly in alignment.

3. The assembly according to claim 1, where the anamorphic lens comprises a plastic lens.

4. The assembly according to claim 1, where the laser light source comprises a visible laser diode.

5. The assembly according to claim 1, where CUX=CUY, KX=KY, and AP=BP=CP=DP=0.

6. The assembly according to claim 1, where CUX is approximately −

12.1895, CUY is approximately −

1/2.2350, and KX=KY=AR=BR=CR=DR=AP=BP=CP=DP=0.

7. The assembly according to claim 1, further comprising a laser drive circuit for generating and delivering drive current signals to the laser light source.

8. A laser scanning system, comprising:

a housing having a light transmission window;

an elongated laser beam optical assembly, comprising;

a laser light source that produces a laser beam,

a cylindrical anamorphic lens having a first surface at a first end and an anamorphic surface at a second end thereof, the first end receiving the laser beam from the laser light source and producing an output laser beam from the second end thereof, and

an aperture that passes the output laser beam from the second end of the anamorphic lens to produce an elongated laser beam; and

a laser scanning mechanism for scanning said elongated laser beam out of said housing through said light transmission window and across a scanning field defined external to said housing, in which a bar code symbol is present for scanning by said elongated laser scanning beam;

wherein a curvature of the anamorphic surface is given by;

9. The assembly according to claim 8, further comprising a laser drive circuit for generating and delivering drive current signals to the laser light source.

10. The system according to claim 8, further comprising a yoke that holds the assembly in alignment.

11. The assembly according to claim 8, where the anamorphic lens comprises a plastic lens.

12. The assembly according to claim 8, where the laser light source comprises a visible laser diode.

13. The assembly according to claim 8, where CUX=CUY, KX=KY, and AP=BP=CP=DP=0.

14. The assembly according to claim 8, where the first surface comprises either a planar surface or an anamorphic surface.

15. An elongated laser beam optical assembly, comprising:

a laser light source that produces a laser beam;

a cylindrical anamorphic lens having a first surface at a first end and an anamorphic surface at a second end thereof, the first end receiving the laser beam from the laser light source and producing an output laser beam from the second end thereof; and

an aperture that passes the output laser beam from the second end of the anamorphic lens to produce an elongated laser beam;

wherein a curvature of the anamorphic surface is given by;

16. The assembly according to claim 15, where the first surface comprises either a planar surface or an anamorphic lens surface.

17. The assembly according to claim 15, further comprising a laser drive circuit for generating and delivering drive current signals to the laser light source.

18. The assembly according to claim 15, further comprising a yoke that holds the assembly in alignment;

and where the anamorphic lens comprises a plastic lens and the laser light source comprises a visible laser diode.