Micro-Raman Apparatus and Method for Controlling Micro- Raman Apparatus

A micro-Raman apparatus comprising:

• a light source unit including a plurality of light source devices configured to emit lights of different wavelengths from one another;
• an objective lens unit that collects light from the light source unit and irradiates a sample to be analyzed with the light;
• a detection device that detects Raman-scattered light emitted from the sample;
• a drive device that changes a relative distance between the sample and the objective lens unit;
• and
• a controller that controls the drive device, wherein
• the controller is configured to correct the relative distance in accordance with a wavelength of light emitted from a light source device to be used,
• the light source unit is configured to switch a light source device to be used among the plurality of light source devices,
• the controller includes
• a processor, and
• a storage device having stored thereon information about a wavelength of each of the plurality of light source devices, and
• when a light source device to be used is changed, the processor is configured to obtain, from the storage device, wavelengths of light source devices before and after the change, and correct the relative distance in accordance with a relative difference in wavelength between the light source devices before and after the change.

A method for controlling a micro-Raman apparatus,

• the micro-Raman apparatus including
• a light source unit including a plurality of light source devices configured to emit lights of different wavelengths from one another,
• an objective lens unit that collects light from the light source unit and irradiates a sample to be analyzed with the light,
• a detection device that detects Raman-scattered light emitted from the sample,
• a drive device that changes a relative distance between the sample and the objective lens unit, and
• a storage device having stored thereon, for each of the plurality of light source devices, a correction value from a reference distance between the sample and the objective lens unit, wherein
• the light source unit is configured to switch a light source device to be used among the plurality of light source devices,
• the method comprising:
• obtaining information about the plurality of light source devices;
• obtaining, from the storage device, the correction value corresponding to a light source device to be used;
• and
• driving the drive device based on the obtained correction value to change the relative distance.

A method for controlling a micro-Raman apparatus,

• the micro-Raman apparatus including
• a light source unit including a plurality of light source devices configured to emit lights of different wavelengths from one another,
• an objective lens unit that collects light from the light source unit and irradiates a sample to be analyzed with the light,
• a detection device that detects Raman-scattered light emitted from the sample,
• a drive device that changes a relative distance between the sample and the objective lens unit, and
• a storage device having stored thereon information about a wavelength of each of the plurality of light source devices,
• the method comprising:
• obtaining information about the plurality of light source devices;
• when a light source device to be used is changed, obtaining, from the storage device, wavelengths of light source devices before and after the change;
• and
• driving the drive device in accordance with a relative difference in wavelength between the light source devices before and after the change to change the relative distance.