Introduce
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RETAX is a wave plate which can make it possible to get specific retardance. A birefringent film is glued within optical glass plates. Line-up includes for specific wavelength and for broadband wavelength range . |
Function of wave plate
1/4-wave plate
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- 1/4 wave plate realizes a quarter retardance to incident light. A circularly polarizing plate is realized when 1/4 wave plate is combined with a linear polarizer. A circularly polarizing plate has a function of isolator to block reflection light from a reflection plane, in case incident light goes into the circularly polarizing plate and the outgoing light is reflected on the reflection plane and goes back into the circularly polarizing plate.
1/2-wave plate
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- 1/2 wave plate realizes a half retardance to incident light. When linearly polarized light goes into 1/2 wave plate at an angle of θ-degree to an optical axis of the half wave plate, a vibration direction of outgoing polarized light is rotated by 2 θ . Therefore when linearly polarized light goes into a half wave plate at an angle of 45-degree to an optical axis, an outgoing light become a linearly polarized light of which a vibration direction rotated by 90-degree to the initial vibration direction of incident light. When a circularly polarized light goes into a half wave plate, an outgoing light become reverse rotated circularly polarized light.
1-Lambda wave plate
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- 1-lambda wave plate of RETAX & HI-RETAX is called a sensitive color plate, its specific wavelength is 530nm. When 1-lambda wave plate is set between 2 pcs of polarizers crossed each other, white light which passes the polarizers and 1-lambda wave plate, is changed to bluish purple light. This system is called a sensitive color method by utilizing sensitive hue change. This method makes it easer to observe a color change, when a sample with a little birefringence is observed.
Line up
