| 摘要 |
PURPOSE: A wavelength detector and an optical coherence topography device having the same are provided to prevent the distortion of an image by having a narrow line width by acquiring accurate wavelength information by the scanning of a position according the wavelength of a light source. CONSTITUTION: A wavelength detector comprises a first collimator(210), a first diffraction grating(220), a first focus lens(230), a wavelength-variable filter(240), and a light emitting unit(300). The first diffraction grating diffracts a first light emitted from the first collimator according to a plurality of wavelengths according to an incident angle. The first focus lens focuses the first light emitted from the first diffraction grating. The wavelength-variable filter is arranged on a position, on which a first light emitted from the first focus lens is focused. The wavelength-variable filter comprises a movable single slit. The light emitting unit emits a second light supplied from the wavelength-variable filter.
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