JP2581437Y2 - Etalon temperature controller - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention relates to an etalon temperature controller.

[0002]

2. Description of the Related Art Etalons are used for narrow band filters for optical communication, etc., but are susceptible to ambient temperature. Therefore, the temperature of the etalon may be adjusted intentionally,
Techniques are needed to quickly change the temperature of the etalon and keep it stable.

Next, the structure of a conventional etalon temperature controller will be described with reference to FIG. 1 in FIG. 3 is an etalon,
5 is a Peltier element, 11 is the center of the etalon 1,
12 is a thermistor detection point, and 13 is an upper surface of the Peltier element 5. Etalon 1 is easily distorted by external force,
It is directly bonded on the Peltier element 5 with a silicone-based heat conductive adhesive or the like. In FIG. 3, the temperature of the thermistor detection point 12 is detected for controlling the temperature of the etalon 1.

Next, the thermal relationship between the center 11, the detection point 12, and the upper surface 13 in FIG. 3 will be described with reference to FIG. Ra in FIG.
Is the thermal resistance between the central part 11 and the detection point 12, and Rb is the detection point 1
The thermal resistance between the upper surface 13 and the central portion 11 and Rc
Is the thermal resistance between the two.

Next, another configuration diagram of FIG. 3 will be described with reference to FIG. In FIG. 4, the thermistor detection point 12 is
Has been changed to the upper surface. Compared to FIG. 3, thermistor detection point 1
Since 2 is the upper surface of the Peltier element 5, the thermal resistance Rb is very small.

Next, another configuration diagram of FIG. 3 will be described with reference to FIG. In FIG. 5, the etalon 1 is surrounded by three holders 6 to 8. Since the holders 6 to 8 are in surface contact with the side surfaces of the etalon 1, the thermal resistance between the holders 6 to 8 and the etalon 1 is small.

Next, another configuration diagram of FIG. 3 will be described with reference to FIG. In FIG. 6, a seamless holder 9 is used. According to the holder 9, the heat of the Peltier element 5 is efficiently transferred to the etalon 1.
Can be conveyed to. However, the etalon 1
, The hole in the holder 9 must be larger than the etalon 1.

[0008]

In FIG. 3, since only one of the four sides of the etalon 1 contacts the Peltier element 5, the thermal resistance Ra and the thermal resistance Rc increase. Since the thermistor detection point 12 is on the etalon 1, the thermal resistance Rb is also large. As a result, hunting tends to occur and stability is poor. In FIG. 4, since the thermal resistance Ra is large, even if the upper surface temperature of the Peltier element 5 reaches the target value, the temperature at the center of the etalon 1 is delayed. As a result, an error occurs between the thermistor detection temperature and the central temperature of the etalon 1, and the temperature responsiveness deteriorates.

In FIG. 5, the holder 8 is compared with the holders 6 and 7.
Is not in direct contact with the Peltier element 5, so that the effect is low only by increasing the heat load. In FIG. 6, two of the four side surfaces have a gap between the etalon 1 and the holder 9, and the holder 9
Heat transfer between the etalon 1 and the etalon 1 is poor.

This invention is based on the following four aspects of etalon 1.
The two adjacent surfaces are brought into surface contact with the V-groove of the first holder, the other two adjacent surfaces of the etalon 1 are brought into surface contact with the V-groove of the second holder, and the bottom surface of the first holder and the second holder Of the etalon 1 by contacting the Peltier element 5 with the bottom of the etalon 1
The first holder and the second holder are brought into close contact with all sides,
An object of the present invention is to provide an etalon temperature controller having a small thermal resistance and a high temperature response speed.

[0011]

In order to achieve this object, according to the present invention, of the four sides parallel to the optical axis 10 of the etalon 1, a V-groove 2A which comes into surface contact with two sides of the adjacent etalon 1 is provided. A holder 3 having a V-groove 3A in surface contact with two other adjacent surfaces of the etalon 1 and having a hole 3C in an upper surface 3B, and a thermistor 4 inserted in the hole 3C;
A Peltier element 5 is provided in contact with the bottom surface 2B of the holder 2 and the bottom surface 3D of the holder 3, and the four sides of the etalon 1 are brought into surface contact with the V groove 2A of the holder 2 and the V groove 3A of the holder 3.

[0012]

Next, the configuration of the etalon temperature controller according to the present invention will be described with reference to FIG. 1 and 2 are holders and 4
Is a thermistor, and the others are the same as those in FIG.
The holder 2 has a V-shaped groove 2 </ b> A that makes surface contact with two adjacent etalons 1, out of four side surfaces parallel to the optical axis 10 of the etalon 1.
With. The holder 3 has a V-groove 3A in surface contact with the other two adjacent surfaces of the etalon 1, and has a hole 3C in the upper surface 3B. The thermistor 4 is inserted into the hole 3C, and the Peltier element 5 contacts the bottom surface 2B of the holder 2 and the bottom surface 3D of the holder 3. The four sides of the etalon 1 have V-grooves 2A of the holder 2 and V-grooves 3 of the holder 3.
Surface contact with A.

Next, a side view of FIG. 1 will be described with reference to FIG. In FIG. 2, since both the holders 2 and 3 are in surface contact with the upper surface of the Peltier element 5, the Peltier element 5 and the holders 2.3
Heat is efficiently transmitted between the two. Since the etalon 1 is surrounded from both sides by the V-groove 2A of the holder 2 and the V-groove 3A of the holder 3, all four side surfaces of the etalon 1 can be brought into close contact with the holder 2.3, and the efficiency from the holder 2.3 to the etalon 1 can be improved. Can transfer heat well. Therefore, the thermal resistances Ra, Rb, and Rc in FIG. 8 can be reduced.

[0014]

Next, the structure of another embodiment according to the present invention will be described with reference to FIG. 1 and 2 illustrate an example of a prismatic etalon, but as shown in FIG.
The same effect can be obtained by making the groove shape of the holders 2 and 3 into a circular groove having the same diameter as the outer diameter of the etalon.

[0015]

According to the invention, of the four sides of the etalon, two adjacent sides of the etalon are brought into surface contact with the V-grooves of the first holder, and the other two adjacent sides of the etalon are brought into contact with the V-groove of the second holder. Since the groove is brought into surface contact, and the Peltier element 5 is brought into contact with the bottom surface of the first holder and the bottom surface of the second holder, the first holder and the second holder can be brought into close contact with all four side surfaces of the etalon, Thermal resistance can be reduced and the response speed of temperature can be increased.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an etalon temperature controller according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a configuration diagram of an etalon temperature controller according to the related art.

FIG. 4 is another configuration diagram of FIG. 3;

FIG. 5 is another configuration diagram of FIG. 3;

FIG. 6 is another configuration diagram of FIG. 3;

FIG. 7 is a configuration diagram of an embodiment according to the present invention.

FIG. 8 is an explanatory diagram of a thermal relationship among components of the etalon.

[Explanation of symbols]

 Reference Signs List 1 etalon 2 holder 2A V-groove 2B bottom surface 3 holder 3A V-groove 3B top surface 3C hole 3D bottom surface 4 thermistor 5 Peltier element 10 optical axis of etalon 1

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 5/20-5/28 G02B 7/00 G05D 23/20

Claims (1)

(57) [Scope of request for utility model registration] An etalon (1) having an optical axis (10) parallel to the optical axis (10).
A first holder (2) having a first V-groove (2A) in surface contact with two surfaces of an adjacent etalon (1), and a surface contact with other two adjacent surfaces of the etalon (1); The second V
A second holder with a groove (3A) and a hole (3C) in the upper surface (3B)
(3), a thermistor (4) inserted into the hole (3C), a bottom surface (2B) of the first holder (2) and a bottom surface of the second holder (3)
(3D), a Peltier element (5), and a first V-groove (2A) of the first holder (2) and a second holder (3).
An etalon temperature controller, wherein four side surfaces of the etalon (1) are brought into surface contact with the second V-groove (3A).