■ No self-absorption error as the device except for illuminant are located out of integrating space
■ Sensitivity doubled thanks to mirror reflection resulting improved accuracy.
■ Symmetrical light distribution by the specular and real image minimizes integrating error.
Backlight-like surface illuminant are accurately measured
● At the center of Sphere
・Spatial distribution of luminous is biased to the half.
・Self-absorption of lamp supporter increases
● At the sphere wall
・Integrating space is sagged and an illuminant
uniformity on the wall is spoiled.
・Integrating efficiency is reduced by decreasing the
diffuse wall
● Because of the mirror image an illuminance on the
wall is high intensity and good uniformity.
● Lamp supporter and driving device are out of
integrating space.
■ Only 1/2 space required comparing with sphere type. The sample can be changed without opening sphere.
To change the sample the sphere must be full open.
Inside wall is exposed and may be stained.
To change the sample only the small window is used. Further only 1/2 space is required comparing with Sphere.
