摘要:
The invention relates to a biopsy device, particularly a biopsy device comprising a shaft with a transducer element for providing information about acoustic properties of a material to be analysed, a system of positioning a biopsy device and a method for positioning a biopsy device. The biopsy device may be adapted to take biopsies of different regions of the 5 human body for excluding or detecting abnormalities as cancerous lesions. The biopsy device may be used to measure acoustic properties of the material while inserting the tip portion of the biopsy device into the material to be analysed. The biopsy device may further allow measurement based on elastography.
摘要:
An objective lens system for an optical biopsy device has a lens that comprises a first part configured for viewing at a first magnification, and a second part configured for viewing at a second magnification. The second magnification is substantially different from the first magnification. The first magnification enables viewing a larger area of a target and the second magnification enables viewing the target at a cellular level with high sensitivity and specificity. Combining viewing at two different magnifications in a single objective lens results in a compact optical biopsy device.
摘要:
A device (100) for imaging an object (101), wherein the device (100) comprises an objective lens (102) adapted to manipulate a beam of electromagnetic radiation (103) transmitted through the object (101), a collimator lens (104) adapted to manipulate the beam of electromagnetic radiation (103) transmitted through the objective lens (102), and an actuator (105) adapted for displacing the objective lens (102) in a direction essentially parallel and in a direction essentially perpendicular to a propagation direction of the beam of electromagnetic radiation (103) between the objective lens (102) and the collimator lens (104), wherein the objective lens (102) and the collimator lens (104) are arranged so that the beam of electromagnetic radiation (103) between the objective lens (102) and the collimator lens (104) is essentially parallel.
摘要:
In an optical scanning device (10) capable of scanning an information plane of an optical record carrier (5) of different types such as BD, DVD and CD, the diameter of the radiation spot on the detector (7) is dependent on the numerical aperture of the objective system (4) that is used for scanning the record carrier An optimal design of the optical detection system for scanning a BD, result in a small radiation spot for the other types such as DVD and CD. By implementing an optical element (13) that increases the diameter of the radiation spot in the situation a DVD or CD is scanned, the influence of stray light is reduced and the tracking signals are improved
摘要:
An acoustic probe (100, 300) includes an acoustic transducer (15, 444), and a plurality of variably-refracting acoustic lens elements (10, 210a, 210b, 442) coupled to the acoustic transducer. Each variably-refracting acoustic lens element has at least a pair of electrodes (150, 160) adapted to adjust at least one characteristic of the variably-refracting acoustic lens element in response to a selected voltage applied across the electrodes. In one embodiment, each variably-refracting acoustic lens element includes a cavity, first and second fluid media (141, 142) disposed within the cavity, and the pair of electrodes. The speed of sound of an acoustic wave in the first fluid medium is different than the speed of sound of the acoustic wave in the second fluid medium. The first and second fluid media are immiscible with respect to each other, and the first fluid medium has a substantially different electrical conductivity than the second fluid medium.
摘要:
An illumination device comprising a light source (2), an electro-wetting based optical element (1, 10), arranged in front of the light source to allow refraction of a beam of light emitted from said light source, and driving means (9) arranged to operate said optical element between at least two predefined states, said states being adapted to result in refracted beams having different light intensity distribution. According to this design, the electrowetting based optical element can be used to dynamically alter the light intensity distribution of the illumination device between a number of predefined states.
摘要:
An optical scanning device for scanning an information carrier. The device includes an array optical element arranged to generate an array of radiation spots from an incident radiation beam, for the scanning of the information carrier. The device further includes an aberration optical element arranged to apply a predetermined optical aberration to the radiation for correction of optical aberration in the radiation spots.
摘要:
A variable focus (10) lens comprising a fluid chamber (12) containing a first fluid (14) and a second fluid (16) is disclosed. The fluids are non-miscible and in contact over a meniscus (18) and the second fluid is able to alter its shape on the influence of a magnetic field. The second fluid is preferably a ferrofluid. Means (20, 22) for applying a gradient magnetic field (24) over at least a part of the fluid chamber are provided that are capable of inducing a magnetic flux maximizing movement of the fluids, such that the shape of the meniscus varies in dependence on the magnetic field.
摘要:
An optical scanning device provides a radiation source (2,200), a collimator lens (4,40), an objective (7,90) for converting a beam (5,30′) to a scanning spot at the position of an information layer (101) of a record carrier (1,100). The device also includes an electrowetting cell (6). The electrowetting cell (6) acts such that a beam (5,30′) enters the objective (7,90) at a predetermined height of an entrance pupil of the objective (7,90) independent of the position of the objective (7,90) and that the beam (5,30′) forms a predetermined angle at the entrance pupil of the objective (7,90) with the optical axis (8). In this way the rim intensity may be kept constant over the entrance pupil of the objective (7,90).
摘要:
An optical scanning device provides a radiation source 2,200), a collimator lens (4,40), an objective (7,90) for converting a beam (5,30′) to a scanning spot at the position of an information layer (101) of a record carrier (1,100). The device also includes an electrowetting cell (6). The electrowetting cell (6) acts such that a beam (5,30′) enters the objective (7,90) at a predetermined height of an entrance pupil of the objective (7,90) independent of the position of the objective (7,90) and that the beam (5,30′) forms a predetermined angle at the entrance pupil of the objective (7,90) with the optical axis (8). In this way the rim intensity may be kept constant over the entrance pupil of the objective (7,90).