IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0139803
(2005-05-31)
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발명자
/ 주소 |
- Tsukamoto,Koji
- Ishii,Masatoshi
- Kato,Masayuki
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출원인 / 주소 |
|
대리인 / 주소 |
Westerman, Hattori, Daniels &
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인용정보 |
피인용 횟수 :
3 인용 특허 :
10 |
초록
▼
An optical element comprising a transparent body 10 including a first end face 12; a second end face 14 forming a prescribed angle to the first end face; and a third end face 15 having a plurality of light reflection parts 16a-16 d formed on, which respectively reflect a plurality of light signals e
An optical element comprising a transparent body 10 including a first end face 12; a second end face 14 forming a prescribed angle to the first end face; and a third end face 15 having a plurality of light reflection parts 16a-16 d formed on, which respectively reflect a plurality of light signals entering one of the first end face and the second end face to cause to exit at the other of the first end face and the second end face, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the first end face being a first pitch, and a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the second end face being a second pitch which is different from the first pitch. The light emitting element array, etc. including the light emitting elements, etc. arranged at the first pitch in an array, and the optical waveguide array including the optical waveguides arranged at the second pitch in an array can be easily connected optically with each other.
대표청구항
▼
The invention claimed is: 1. An optical element comprising a transparent body including a first end face; a second end face forming a prescribed angle to the first end face; and a third end face having a plurality of light reflection parts formed on, which respectively reflect a plurality of light
The invention claimed is: 1. An optical element comprising a transparent body including a first end face; a second end face forming a prescribed angle to the first end face; and a third end face having a plurality of light reflection parts formed on, which respectively reflect a plurality of light signals entering one of the first end face and the second end face to cause to exit at the other of the first end face and the second end face, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the first end face being a first pitch, and a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the second end face being a second pitch which is different from the first pitch, wherein the plurality of light reflection parts formed on the third end face are tilted respectively by the same angle to the first end face. 2. An optical element according to claim 1, wherein the intersection angle between the first end face and the second end face is substantially 90 degrees, and the plurality of light reflecting parts formed on the third end face are tilted respectively by about 45 degrees to the first end face or the second end face. 3. An optical element according to claim 1, wherein a plurality of lenses are formed on the first end face at the first pitch. 4. An optical element according to claim 1, wherein a plurality of lenses are formed on the second end face at the second pitch. 5. An optical element according to claim 3, wherein the lenses are formed integral with the transparent body. 6. An optical element according to claim 4, wherein the lenses are formed integral with the transparent body. 7. An optical element according to claim 3, wherein the lens is formed so that a beam waist of the light signal is positioned in a vicinity of the light reflecting part. 8. An optical element according to claim 4, wherein the lens is formed so that a beam waist of the light signal is positioned in a vicinity of the light reflecting part. 9. An optical element according to claim 1, wherein a light absorber which absorbs light is formed on the face of the third end face except the light reflecting part. 10. An optical element according to claim 1, wherein a light reflecting film which reflects the light signals is formed on the light reflecting parts formed on the third end face. 11. An optical transmission unit comprising: a circuit board; a plurality of light emitting elements disposed on the circuit board and arranged at a first pitch, for respectively emitting light signals; and an optical element disposed on the circuit board and comprising a transparent body including a first end face opposed to the plurality of light emitting elements, a second end face forming a prescribed angle to the first end face, and a third end face having a plurality of light reflecting parts which respectively reflect the plurality of light signals entering at the first end face and causing the plurality of light signals to exit at the second end face, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the first end face being the first pitch, and a pitch of the plurality of light reflection parts formed on the third end face, which are projected on the second end face being a second pitch which is different from the first pitch, wherein the plurality of light reflection parts formed on the third end face are tilted respectively by the same angle to the first end face. 12. An optical transmission unit comprising: a circuit board; an optical element disposed on the circuit board and including a transparent body including a first end face, a second end face forming a prescribed angle to the first end face, and a third end face having a plurality of light reflecting parts which respectively reflect a plurality of light signals entering at the second end face to cause the light signals to exit at the first end face, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the first end face being a first pitch, and a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the second end face being a second pitch which is different form the first pitch; and a plurality of light receiving elements arranged at the first pitch, opposed to the first end face of the optical element, which respectively receive the plurality of light signals, wherein the plurality of light reflection parts formed on the third end face are tilted respectively by the same angle to the first end face. 13. An optical transmission unit according to claim 11, further comprising a plurality of optical waveguides arranged at the second pitch, opposed to the second end face of the optical element. 14. An optical transmission unit according to claim 12, further comprising a plurality of optical waveguides arranged at the second pitch, opposed to the second end face of the optical element. 15. An optical transmission system comprising: a plurality of light emitting elements arranged at a first pitch, for respectively emitting light signals; a first optical element including a transparent body having a first end face opposed to the plurality of light emitting elements, a second end face forming a prescribed angle to the first end face, and a third end face having a plurality of light reflecting parts which respectively reflect the plurality of light signals entering at the first end face to cause the plurality of light signals to exit at the second end face, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the first end face being the first pitch, a pitch of the plurality of light reflecting parts formed on the third end face, which are projected on the second end face being a second pitch which is different from the first pitch; a plurality of optical waveguides arranged at the second pitch and having one ends opposed to the second end face of the first optical element; and a second optical element including a fourth end face opposed to the other ends of the plurality of optical waveguides, a fifth end face forming a prescribed angle to the fourth end face, and a sixth end face having a plurality of light reflecting parts formed on, which respectively reflect a plurality of light signals entering at the fourth end face to cause the plurality of light signals to exit at the fifth end face, a pitch of the plurality of light reflecting parts formed on the sixth end face, which are projected on the fifth end face being the first pitch, and a pitch of the plurality of light reflecting parts formed on the sixth end face, which are projected on the fourth end face being the second pitch; and a plurality of light receiving elements arranged at the first pitch, opposed to the fifth end face of the second optical element, for respectively receiving the plurality of light signals. 16. An optical transmission system according to claim 15, wherein the first optical element and the second optical element are arranged so that the light signal reflected on the light reflecting part of the plurality of light reflecting parts formed on the third end face, which is nearest to the first end face is reflected on the other light reflecting part of the plurality of other reflecting parts formed on the sixth end face, which is remotest from the fourth end face, and the light signal reflected on the light reflecting part of the plurality of light reflecting parts formed on the third end face, which is remotest from the first end face is reflected on the other light reflecting part of the plurality of other reflecting parts formed on the sixth end face, which is nearest to the fourth end face.
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