Method for the manufacture of an optical manipulation chamber

• US 5,364,744 A
• Filed: 07/23/1992
• Issued: 11/15/1994
• Est. Priority Date: 07/23/1992
• Status: Expired due to Fees

• Current Assignee: Cell Robotics Incorporated
• Original Assignee: Cell Robotics Incorporated
• Inventors: Buican, Tudor N., Carlson, Kevin M.
• Primary Examiner(s): Bowers, Jr., Charles L.
• Assistant Examiner(s): McPherson, John A.
• Application Number:
  US07/919,183
• Time in Patent Office: 845 Days
• Field of Search: 430/321, 430/328, 430/945, 422/58, 356/244, 264/22, 427/508, 427/510
• US Class Current: 430/321
• CPC Class Codes: B29C 2035/0827 using UV radiation
• CPC Class Codes: B29C 2035/0838 using laser
• CPC Class Codes: B29C 35/08 by wave energy or particle radiation B29C64/00, B29C71/04 take precedence
• CPC Class Codes: B29C 39/126 by casting between two preformed layers, e.g. deformable layers between two glass layers B32B17/10917
• CPC Class Codes: B29D 11/00 Producing optical elements, e.g. lenses or prisms grinding or polishing of optical elements B24B; constructional form of optical elements G02B; optical parts of spectacles G02C7/00
• CPC Class Codes: B29K 2105/0002 monomers or prepolymers
• CPC Class Codes: Y10S 430/146 Laser beam

Abstract

A chamber is disclosed, as for example an optical manipulation chamber, which has a pair of spaced windows and a central core member between the windows. The windows are aligned in parallel planes and the central core member contains a plurality of compartments and channels. A radiation curable resin is used, in combination with injection ports, to form the channels and compartments. The configuration of the channels and compartments is placed on a mask having shielding and nonshielding regions. Radiation is passed through the mask as the resin is injected through the ports, thereby curing the resin which is exposed to the radiation. The channels and compartments can be accurately designed in minute detail.

Claims

1. The method of manufacture of an optical manipulation chamber, the optical manipulation chamber having a pair of spaced substrate members, at least one substrate member being transparent to polymerizing radiation and a central core member between said pair of spaced substrate members, said substrate members lying in essentially parallel planes and said central core member containing a plurality of compartments and channels, comprising the steps of;

a) placing a radiation mask between one of said substrate members and a source of polymerizing radiation, said substrate member being essentially transparent to polymerization radiation, said mask having radiation shielding regions and non-shielding regions, said non-shielding regions being in a pattern corresponding to the pattern of said plurality of compartments and channels,

b) pumping a radiation curable resin into the space between said pair of spaced substrate members,

c) applying radiation from said source of polymerizing radiation to said radiation curable resin while it is being pumped into the space between said pair of spaced substrate members, thereby causing said radiation curable resin to at least partially cure and to prevent uncured resin from being pumped into said non-shielded regions, and

d) exposing all of said radiation curable resin to said source of polymerization radiation until all of said radiation curable resin is cured.

2. The method of claim 1, wherein said radiation mask is removed from its position between said one of said substrate members and said source of polymerizing radiation, prior to the step of exposing all of the radiation curable resin to said polymerizing radiation until all of the radiation curable resin is cured.

3. The method of claim 1, wherein said radiation curable resin is pumped into the space between said two substrate members through a plurality of ports in one of said substrate members.

4. The method of claim 1, wherein said polymerization radiation is UV radiation.

5. The method of claim 1, wherein said radiation mask is spaced from said one of said substrate members.

6. The method of claim 5, wherein the unshielded area is optically reduced.

7. The method of claim 1, wherein said resin is strongly radiation absorbing resin.

8. The method of claim 1, wherein said resin further includes radiation absorber.

9. The method of claim 1, wherein said radiation is produced by a scanned laser beam.

10. The method of claim 9, wherein the scanning rate of said scanning laser is greater than the flow rate of said radiation curable resin.

11. The method of claim 9, wherein the illumination of each scanned segment is stopped as soon as curing is sufficiently advanced, and the total amount of light scattered during the manufacturing of the chamber is reduced.

12. The method of claim 1, wherein the flow of resin is limited to the inside of the chamber.

13. The method of manufacture of chambers in a three layer device having a pair of spaced substrate members and a central core member between said pair of substrate members, said substrate members lying in substantially parallel planes, comprising the steps of;

a) flowing a radiation curable resin into the space between said pair of substrate members,

b) applying radiation from a source of radiation to predetermined regions of said radiation curable resin while said radiation curable resin is being pumped into the space between said pair of substrate members, thereby causing said predetermined regions of radiation curable resin to at least partially cure and to prevent uncured resin from flowing past said at least partially cured regions, and

c) exposing all of said radiation curable resin to said source of radiation until all of said radiation curable resin is cured.

14. The method of claim 13, wherein said predetermine regions form at least one enclosed chamber free of radiation curable resin.

15. The method of claim 14, wherein said chamber is an elongated channel free of radiation curable resin and wherein the surface tension between said radiation curable resin and said substrate members causes said enclosed channel to have concave side walls.

16. The method of claim 14, wherein said radiation is laser radiation.

17. The method of claim 15, wherein said radiation is produced by a scanning laser.

18. The method of claim 13, wherein predetermined regions form enclosed zones, and wherein said scanning laser irradiates said predetermined regions of radiation curable resin before uncured resin can flow into said enclosed zones, thereby forming enclosed zones which are free of radiation curable resin.

26. The method of claim 13, comprising the step of:

b) applying a laser beam from a scanning laser to predetermined regions of said radiation curable resin while said radiation curable resin is being delivered onto said support surface, irradiating said predetermined regions of radiation curable resin with said scanning laser at a rate which is greater than the flow rate of uncured resin into said enclosed zones, causing said predetermined regions of radiation curable resin to at least partially cure and to prevent uncured resin from being delivered past said at least partially cured regions, thereby forming enclosed zones which are free of radiation curable resin.

27. The method of claim 26, wherein said scanner laser scans at a rate of at least about 600 line per thirtieth of a second.

19. The method of manufacture of a structural device having a pair of spaced members, a central core member between said pair of spaced members, and at least one included resin free zone in said core member, at least one of said pair of spaced members being radiation transparent, comprising the steps of;

a) delivering a radiation curable resin into the space between said pair of spaced members,

b) applying radiation to at least one predetermined region of said radiation curable resin while it is being delivered into the space between said pair of spaced members, thereby causing said predetermined region of radiation curable resin to at least partially cure and to prevent uncured resin from being pumped past said at least partially cured region, and

c) exposing all of the radiation curable resin to radiation until all of the radiation curable resin is cured, whereby a structural member is formed having at least one internal included resin free zone.

20. The method of claim 19, wherein said radiation is applied to predetermined regions of said radiation curable resin by shielding selected regions with a radiation impermeable mask, said mask being provided with at least a pair of spaced slits along opposite edges of said mask, whereby said slits create a narrow, high intensity illumination field around the chamber which stops the outward flow of the resin.

21. The method of claim 19, wherein said radiation curable resin is pumped to the space between said pair of spaced members.

22. The method of claim 21, wherein wherein the surface tension between said radiation curable resin and said spaced members causes said resin free zone to have concave side walls.

23. The method of claim 22, wherein said resin free zone is an elongated channel free of radiation curable resin.

24. The method of claim 19, wherein said resin free zone has a diameter on the order of less than about one half millimeter.

25. The method of claim 23, wherein said concave walls of said elongated channel have a maximum spacing on the order of about 100 microns.