US4884856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polygonal mirror and method of making same
Assignee: Pentax Corp
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Filing: 1988-04-01
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Granted: 1989-12-05
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Expires: 2008-04-01
Abstract
Abstract A polygonal mirror comprising a mirror body in the form of a regular prism. A plurality of side faces of the regular prism are formed respectively into reflecting faces. During rotation of the mirror body about its central axis, the reflecting faces successively deflect an indicent light ray to cause the deflected light ray to carry out scanning. A flange is integrally provided on the mirror body, and has a size at least equal to a circle circumscribing the regular prism in a plane perpendicular to the central axis.
Inventors
- 👤 Hatsuichi Takeyasu
- 👤 Kenichi Sakata
- 👤 Fumitoshi Yura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:37
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/09
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
95 words
A polygonal mirror comprising: a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis.
Claim 2
Dependent Claim
95 words
A polygonal mirror comprising: a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis.
Claim 3
Dependent Claim
27 words
The polygonal mirror according to claim 1, wherein said flange is in the form of a disc having a diameter larger than that of said circumscribed circle.
Claim 4
Dependent Claim
48 words
The polygonal mirror according to claim 1, wherein said flange has a projection projecting axially from an axial end face of said flange remote from another axial end face of said flange adjacent said mirror body, said projection having a free end face formed into a reference surface.
Claim 5
Dependent Claim
15 words
The polygonal mirror according to claim 3, wherein said projection has a circular cross-sectional shape.
Claim 6
Dependent Claim
19 words
The polygonal mirror according to claim 1, wherein said reflecting faces extend in parallel relation to said central axis.
Claim 7
Dependent Claim
23 words
The polygonal mirror according to claim 1, wherein said reflecting faces are inclined at a predetermined angle with respect to said central axis.
Claim 8
Dependent Claim
52 words
The polygonal mirror according to claim 1, wherein said mirror body is provided therethrough with an attaching bore in concentric relation to said central axis, and wherein said mirror body has a pair of recesses formed respectively in opposite end faces of said mirror body in concentric relation to said central axis.
Claim 9
Dependent Claim
42 words
The polygonal mirror according to claim 1, wherein said mirror body has a recess formed in an end face of said mirror body remote from said flange, said recess having a cross-sectional shape similar in figure to that of said regular prism.
Claim 10
Dependent Claim
15 words
The polygonal mirror according to claim 1, wherein said regular prism is a hexagonal prism.
Claim 11
Dependent Claim
24 words
The polygonal mirror according to claim 1, wherein said flange is unitarily formed in the vicinity of an axial end of said mirror body.
Claim 12
Dependent Claim
43 words
The polygonal mirror according to claim 10, which further comprises a second flange unitarily formed on said mirror body in the vicinity of another axial end thereof, said second flange having a size at least equal to said circle circumscribing said regular prism.
Claim 13
Independent Claim
113 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, injection molding said polygonal mirror to unitarily form said flange and said mirror body.
Claim 14
Independent Claim
113 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, injection molding said polygonal mirror to unitarily form said flange and said mirror body.
Claim 15
Independent Claim
123 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting amolten plastic therethrough to unitarily from said flange and said mirror body.
Claim 16
Independent Claim
123 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting amolten plastic therethrough to unitarily from said flange and said mirror body.
Claim 17
Independent Claim
124 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten polycarbonate therethrough to unitarily form said flange and said mirror body.
Claim 18
Independent Claim
124 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten polycarbonate therethrough to unitarily form said flange and said mirror body.
Claim 19
Independent Claim
134 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a plurality of radial gates to unitarily form said flange and said mirror body.
Claim 20
Independent Claim
134 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a plurality of radial gates to unitarily form said flange and said mirror body.
Claim 21
Independent Claim
132 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a disc gate to unitarily form said flange and said mirror body.
Claim 22
Independent Claim
132 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a disc gate to unitarily form said flange and said mirror body.
Claim 23
Independent Claim
168 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a gate or gates to unitarily form said flange and said mirror body such that the distance from said gate or gates to the extremity of said flange is substantially equalized and such that said molten plastic is injected to a substantially uniform level within said mold cavity.
Claim 24
Independent Claim
168 words
A method of making a polygonal mirror having a mirror body in the form of a regular prism having a central axis, said regular prism having a plurality of side faces formed respectively into reflecting faces wherein, during rotation of said mirror body about said central axis, said reflecting faces successively deflect an incident light ray to cause the deflected light ray to carry out scanning; and a flange unitarily formed on said mirror body, said flange having a size at least equal to a circle circumscribing said regular prism in a plane substantially perpendicular to said central axis, positioning a sprue in substantial alignment with said central axis and injecting a molten plastic therethrough into a mold cavity through a gate or gates to unitarily form said flange and said mirror body such that the distance from said gate or gates to the extremity of said flange is substantially equalized and such that said molten plastic is injected to a substantially uniform level within said mold cavity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |