IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0326443
(2008-12-02)
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등록번호 |
US-8783573
(2014-07-22)
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발명자
/ 주소 |
- Havens, William H.
- Feng, Chen
- Gannon, Colleen P.
- Li, Jianhua
- Wang, Ynjiun P.
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출원인 / 주소 |
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대리인 / 주소 |
Additon, Higgins, Pendleton & Ashe, P.A.
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인용정보 |
피인용 횟수 :
243 인용 특허 :
84 |
초록
▼
There is described an indicia reading terminal having an image sensor array including a plurality of pixels, a first optical assembly for focusing imaging light rays onto a first set of pixels of an image sensor array and a second optical assembly for focusing imaging light rays onto a second set of
There is described an indicia reading terminal having an image sensor array including a plurality of pixels, a first optical assembly for focusing imaging light rays onto a first set of pixels of an image sensor array and a second optical assembly for focusing imaging light rays onto a second set of pixels of the image sensor array. The indicia reading terminal can be adapted to process image data corresponding to pixels of the image sensor array for attempting to decode a decodable indicia.
대표청구항
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1. An indicia reading terminal comprising: a two dimensional image sensor array extending along an image plane, said two dimensional image sensor array comprising a plurality of pixels;a hand held housing encapsulating said two dimensional image sensor array;a first optical assembly having a center
1. An indicia reading terminal comprising: a two dimensional image sensor array extending along an image plane, said two dimensional image sensor array comprising a plurality of pixels;a hand held housing encapsulating said two dimensional image sensor array;a first optical assembly having a center optical axis and an imaging lens, said first optical assembly for focusing imaging light rays onto a first set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said first optical assembly are transmitted about said center optical axis of said first optical assembly, and wherein said first optical assembly is adapted so that said center optical axis of said first optical assembly is essentially unfolded;a second optical assembly having a center optical axis and an imaging lens, said second optical assembly for focusing imaging light rays onto a second set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said second optical assembly are transmitted about said center optical axis of said second optical assembly, and wherein said second optical assembly includes an optical surface that folds said center optical axis of said second optical assembly by an angle of more than 10 degrees;a memory capable of storing a frame of image data, said frame of image data representing light incident on said image sensor array; anda CPU capable of addressing said memory, wherein said CPU is adapted to attempt to decode a decodable indicia represented in said frame of image data;wherein said first optical assembly and said image sensor array define a first field of view, and wherein said second optical assembly and said image sensor array define a second field of view, and wherein said second field of view is defined within said first field of view throughout a range of terminal to target distances of from about 130 mm to about 420 mm. 2. The indicia reading terminal of claim 1, wherein said indicia reading terminal is adapted so that a field of view defined by said first optical assembly in combination with said image sensor array when said indicia reading terminal is at a certain terminal to target distance is larger than a field of view defined by said second optical assembly in combination with said image sensor array when said indicia reading terminal is at said certain terminal to target distance. 3. The indicia reading terminal of claim 1, wherein said first optical assembly has a shorter best focus distance than said second optical assembly. 4. The indicia reading terminal of claim 1, wherein said first optical assembly has a shorter best focus distance than said second optical assembly, wherein said first optical assembly has a shorter focal length than said second optical assembly, and wherein said first and second optical assemblies are fixed assemblies such that said best focus distances and said focal lengths of said first and second optical assemblies are fixed. 5. The indicia reading terminal of claim 1, wherein said first set of pixels comprises a larger number of pixels than a number of pixels of said second set of pixels. 6. The indicia reading terminal of claim 1, wherein a ratio of pixels of said first set of pixels to said second set of pixels is greater than 1.5. 7. The indicia reading terminal of claim 1, wherein said second optical assembly includes a double folding prism disposed in an optical path of said second optical assembly intermediate of said imaging lens of said second optical assembly and said image sensor array, the double folding prism folding said center optical axis of said second optical assembly in at least two locations, said double folding prism being adapted so that said center optical axis of said second optical assembly extends from said image sensor array at an angle that deviates from a normal angle by less than 10 degrees. 8. The indicia reading terminal of claim 1, wherein said second optical assembly includes a double folding prism disposed in an optical path of said second optical assembly intermediate of said imaging lens of said second optical assembly and said image sensor array, the double folding prism having at least two reflective surfaces for bending said center optical axis of said second optical assembly, said double folding prism being formed utilizing one of a precision molding process and a precision grinding process. 9. The indicia reading terminal of claim 1, wherein said indicia reading terminal is restricted from operating according to an algorithm for attempting to decode a 2D bar code symbol when processing image data corresponding to said second set of pixels. 10. The indicia reading terminal of claim 1, wherein said first optical assembly defines with said image sensor array a first field of view, wherein said second optical assembly defines with said image sensor array a second field of view, and wherein said indicia reading terminal is adapted so that said indicia reading terminal projects an aiming pattern at a substantially fixed location in relation to said second field of view though a range of terminal to target distances ranging from a short range terminal to target distance of about 130 mm to a long range terminal to target distance of about 420 mm. 11. The indicia reading terminal of claim 1, wherein said second optical assembly includes an optical surface that folds said center optical axis of said second optical assembly by more than 30 degrees. 12. The indicia reading terminal of claim 1, wherein said indicia reading terminal includes aiming pattern generator that projects an aiming pattern substantially at a horizontally extending centerline of a field of view defined by said first optical assembly in combination with said image sensor array through a range of terminal to target distances ranging from about 130 mm to 420 mm. 13. The indicia reading terminal of claim 1, wherein said first optical assembly and said image sensor array define a first field of view and wherein said second optical assembly and said image sensor array define a second field of view, and wherein said terminal includes an aiming pattern generator that projects an aiming pattern substantially at a horizontally extending centerline of said second field of view through a range of terminal to target distances. 14. The indicia reading terminal of claim 1, wherein said second optical assembly includes a longer best focus distance and a longer focal length than said first optical assembly. 15. The indicia reading terminal of claim 1, wherein the indicia reading terminal includes a single aiming pattern generator that projects an aiming pattern within the second field of view throughout the range of terminal to target distances of from about 130 mm to about 420 mm. 16. The indicia reading terminal of claim 1, wherein the indicia reading terminal includes a single aiming pattern generator that projects an aiming pattern within the first field of view throughout the range of terminal to target distances of from about 130 mm to about 420 mm. 17. An indicia reading terminal comprising: a two dimensional image sensor array extending along an image plane, said two dimensional image sensor array comprising a plurality of pixels;a hand held housing encapsulating said two dimensional image sensor array;a first optical assembly having a center optical axis and an imaging lens, said first optical assembly for focusing imaging light rays onto a first set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said first optical assembly are transmitted about said center optical axis of said first optical assembly, and wherein said first optical assembly is adapted so that said center optical axis of said first optical assembly is essentially unfolded;a second optical assembly having a center optical axis and an imaging lens, said second optical assembly for focusing imaging light rays onto a second set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said second optical assembly are transmitted about said center optical axis of said second optical assembly, and wherein said second optical assembly includes an optical surface that folds said center optical axis of said second optical assembly by an angle of more than 10 degrees;a memory capable of storing a frame of image data, said frame of image data representing light incident on said image sensor array; anda CPU capable of addressing said memory, wherein said CPU is adapted to attempt to decode a decodable indicia represented in said frame of image data;wherein said indicia reading terminal is capable of processing image data of said certain frame for attempting to decode a 2D bar code symbol representation, and wherein said indicia reading terminal is operative so that a level of optimization for decoding of a 2D bar code symbol representations is greater when said CPU processes image data representing light incident on said first set of pixels than when processing image data representing light incident on said second set of pixels, wherein said first set of pixels and said second set of pixels each comprise pixels of greater than ten rows of pixels. 18. The indicia reading terminal of claim 17, wherein said first optical assembly defines with said image sensor array a first field of view and wherein said second optical assembly defines with said image sensor array a second field of view, and wherein said indicia reading terminal is adapted so that said indicia reading terminal projects an aiming pattern substantially at a horizontally extending centerline of said second field of view though a range of terminal to target distances ranging from a short range terminal to target distance of about 130 mm to a long range terminal to target distance of about 420 mm. 19. The indicia reading terminal of claim 17, wherein said indicia reading terminal is adapted so that said first set of pixels includes a set of pixels extending across more than 50% of the rows of said image sensor array and wherein said second set of pixels includes a set of pixels extending across less than 50% of rows of pixels of said pixels of image sensor array. 20. The indicia reading terminal of claim 17, wherein said indicia reading terminal wherein said first optical assembly and said image sensor array define a first field of view, and wherein said second optical assembly and said image sensor array define a second field of view, and wherein said terminal includes a first a first aiming pattern generator and a second aiming pattern generator, the first aiming pattern generator capable of projecting an aiming pattern substantially at a horizontally extending centerline of said first field of view through a range of terminal to target distances, the second aiming pattern generator capable of projecting an aiming pattern substantially at a horizontally extending centerline of said second field of view through a range of terminal to target distances. 21. The indicia reading terminal of claim 20, wherein the first aiming pattern generator and the second aiming pattern generator are activated in the alternative responsively to a sensed terminal to target distance. 22. The indicia reading terminal of claim 17, wherein said indicia reading terminal is restricted from operating according to an algorithm for attempting to decode a 2D bar code symbol when processing image data corresponding to said second set of pixels. 23. The indicia reading terminal of claim 17, wherein the first set of pixels and the second set of pixels each comprise more than ten rows of pixels. 24. The indicia reading terminal of claim 17, wherein the indicia reading terminal is operative to utilize a 2D bar code symbology decoding algorithm when processing image data corresponding to pixels of the first set of pixels for decoding, wherein the indicia reading terminal is also operative to utilize a 2D bar code symbology decoding algorithm when processing image data corresponding to pixels of the second set of pixels for decoding. 25. An indicia reading terminal comprising: a two dimensional image sensor array extending along an image plane, said two dimensional image sensor array comprising a plurality of pixels;a hand held housing encapsulating said two dimensional image sensor array;a first optical assembly having a center optical axis and an imaging lens, said first optical assembly for focusing imaging light rays onto a first set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said first optical assembly are transmitted about said center optical axis of said first optical assembly, and wherein said first optical assembly is adapted so that said center optical axis of said first optical assembly is essentially unfolded;a second optical assembly having a center optical axis and an imaging lens, said second optical assembly for focusing imaging light rays onto a second set of pixels of said two dimensional image sensor array, wherein said imaging light rays transmitted by said second optical assembly are transmitted about said center optical axis of said second optical assembly, and wherein said second optical assembly includes an optical surface that folds said center optical axis of said second optical assembly by an angle of more than 10 degrees;a memory capable of storing a frame of image data, said frame of image data representing light incident on said image sensor array; anda CPU capable of addressing said memory, wherein said CPU is adapted to attempt to decode a decodable indicia represented in said frame of image data;wherein said second optical assembly includes a double folding prism of unitary construction disposed in an optical path of said second optical assembly intermediate of said imaging lens of said second optical assembly and said image sensor array, the double folding prism folding said center optical axis of said second optical assembly in at least two locations, said double folding prism being adapted so that said center optical axis of said second optical assembly extends from said image sensor array at an angle that deviates from a normal angle by less than 10 degrees. 26. The indicia reading terminal of claim 25, wherein the double folding prism having at least two reflective surfaces for bending said center optical axis of said second optical assembly, said double folding prism being formed utilizing one of a precision molding process and a precision grinding process. 27. The indicia reading terminal of claim 25, wherein said center optical axis of said second optical assembly extends from said image sensor array at a non-zero angle that deviates from a normal angle by less than 10 degrees. 28. The indicia reading terminal of claim 25, wherein said first optical assembly and said image sensor array define a first field of view, and wherein said second optical assembly and said image sensor array define a second field of view, and wherein said second field of view is defined within said first field of view throughout a range of terminal to target distances of from about 130 mm to about 420 mm.
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