Raman probe and Raman spectrum measuring apparatus utilizing the same

1. A Raman probe for measuring Raman spectrum, comprising:

an exciting-end light guiding path for guiding excitation light from a light source to a sample;

a receiving light-guide path for guiding a light signal from said sample to a detector;

a band-pass filter for passing said excitation light and blocking Raman-scattered light produced from said exciting-end light guiding path;

a pipe for securing said band-pass filter inside said pipe, said pipe being mounted on a light-outgoing end of said exciting-end light guiding path; and

an edge filter mounted on a light-incident end of said receiving light-guide path, said edge filter passing Raman-scattered light from said sample while blocking the excitation light;

wherein the edge filter is a short-wavelength transmitting filter that permits passage of wavelengths shorter than the excitation wavelength.

2. The Raman probe according to claim 1 , wherein said receiving light-guide path is made up of a plurality of optical fibers the light-incident ends of which are arranged around said pipe,

wherein said edge filter is formed in a circular shape with an opening provided at the center, and

wherein the tip of said pipe is inserted into said opening.

3. The Raman probe according to claim 1 , wherein said pipe is made of metal.

4. The Raman probe according to claim 1 , wherein said exciting-end light guiding path consists of a single optical fiber.

5. A Raman-spectrum measuring apparatus, comprising:

a laser light source;

a spectroscope; and

a Raman probe for guiding light emitted by said laser light source to a sample and for guiding Raman-scattered light from said sample to said spectroscope;

wherein the Raman probe is one according to claim 1 .

6. The Raman-spectrum measuring apparatus according to claim 5 , wherein said laser light source is a pulsed light source.