Improvements in or relating to scanning ophthalmoscopes

Details Improvements in or relating to scanning ophthalmoscopes Improvements in or relating to scanning ophthalmoscopes

A - Human Necessities

61

B

A61B 3/12 (2006.01)

Patent

CA 2759578

The invention provides a scanning ophthalmoscope (10) for scanning the retina of an eye and method of operating the same. The scanning ophthalmoscope comprises a source of collimated light (12), a first scanning element (14) and a second scanning element (16). The source of collimated light (12) and the first and second scanning elements (14, 16) combine to provide a two-dimensional collimated light scan from an apparent point source. The scanning ophthalmoscope (10) further comprises a scan transfer device (20), wherein the scan transfer device (20) is a reflective element and has two foci and the apparent point source is provided at a first focus of the scan transfer device (20) and an eye (24) is accommodated at a second focus of the scan transfer device (20), and wherein the scan transfer device (20) transfers the two-dimensional collimated light scan from the apparent point source into the eye (24). The first and second scanning elements (14, 16) have operating parameters which are selected to control the direction of the two-dimensional collimated light scan from the apparent point source and/or adjust the dimensions of the two-dimensional collimated light scan from the apparent point source.

L'invention porte sur un ophtalmoscope à balayage (10) pour balayer la rétine d'un il et sur son procédé de fonctionnement. L'ophtalmoscope à balayage comporte une source de lumière alignée (12), un premier élément de balayage (14) et un second élément de balayage (16). La source de lumière alignée (12) et les premier et second éléments de balayage (14, 16) se combinent pour donner un balayage de lumière alignée bidimensionnel à partir d'une source ponctuelle apparente. L'ophtalmoscope à balayage (10) comporte en outre un dispositif de transfert de balayage (20), le dispositif de transfert de balayage (20) étant un élément réflecteur, ayant deux points focaux, et la source ponctuelle apparente est fournie au niveau d'un premier point focal du dispositif de transfert de balayage (20) et un il (24) est reçu au niveau d'un second point focal du dispositif de transfert de balayage (20), le dispositif de transfert de balayage (20) transférant le balayage de lumière alignée bidimensionnel à partir de la source ponctuelle apparente dans l'il (24). Les premier et second éléments de balayage (14, 16) ont des paramètres de fonctionnement qui sont choisis pour commander la direction du balayage de lumière alignée bidimensionnel à partir de la source ponctuelle apparente et/ou pour ajuster les dimensions du balayage de lumière alignée bidimensionnel à partir de la source ponctuelle apparente.

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