Apparatus for measuring transmittance
An apparatus for measuring transmittance which can realize reliability for measurement of the transmittance of a piece of patterned glass by post dispersion of light. The apparatus includes a light source which is disposed in front of an object that is to be measured, and directs light into the object. An integrating sphere is disposed in the rear of the light source and integrating light incident thereinto. The object is mounted on the front portion of the integrating sphere. A light dispersing part is disposed in the rear of the integrating sphere, and disperses light that has been integrated by and then emitted from the integrating sphere. An optical receiver is disposed adjacent to the light dispersing part, and receives light that has been dispersed by the light dispersing part.
1. An apparatus for measuring transmittance, comprising:
a light source disposed in front of an object that is to be measured, the light source directing light into the object;
an integrating sphere disposed in one side of the light source and integrating light incident thereinto, the object being mounted on a front portion of the integrating sphere, and between the light source and the integrating sphere;
a light dispersing part disposed in a rear portion of the integrating sphere, wherein, the rear portion of the integrating sphere being opposite to the front portion of the integrating sphere, and the front portion of the integrating sphere being close to the light source, the light dispersing part dispersing light that has been integrated by and then emitted from the integrating sphere; and
an optical receiver disposed adjacent to the light dispersing part, the optical receiver receiving light that has been dispersed by the light dispersing part.
2. The apparatus for measuring transmittance of claim 1 , wherein the light source comprises:
a halogen lamp;
an optical filter disposed in the rear of the halogen lamp;
a reflector plate disposed in front of the halogen lamp; and
a focusing lens disposed in the rear of the optical filter.
3. The apparatus for measuring transmittance of claim 2 , wherein the halogen lamp, the optical filter, the reflector plate and the focusing lens are disposed inside a black shield.
4. The apparatus for measuring transmittance of claim 3 , wherein the light source further comprises a first optical fiber disposed in the black shield, the first optical fiber emitting light that has passed through the focusing lens.
5. The apparatus for measuring transmittance of claim 1 , further comprising a collimation lens disposed between the light source and the object, the collimation lens converting light that has been emitted from the light source into collimated light.
6. The apparatus for measuring transmittance of claim 5 , further comprising an aperture disposed between the collimation lens and the object.
7. The apparatus for measuring transmittance of claim 1 , wherein the object closely adjoins a front surface of the integrating sphere.
8. The apparatus for measuring transmittance of claim 1 , wherein light that has been integrated in the integrating sphere is emitted toward the light dispersing part via a second optical fiber which is disposed on a rear portion of the integrating sphere.
9. The apparatus for measuring transmittance of claim 1 , further comprising a signal processor which calculates a transmittance of the object based on a signal transferred from the optical receiver and displays the calculated transmittance of the object.
10. The apparatus for measuring transmittance of any one of claims 1 to 9 , wherein the object is a piece of patterned glass.