2582 - - 69-10 Focus






 Jin immediately begins a comparison test.

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 < of (mechanical transformation) and (magical transformation) to determine which one is easier to operate. The objective is not to destroy them.

 Since destruction is not the objective, it is not done with heat rays or lasers, but with mere <>.

 I ask Reiko, who has good eyesight, to determine which one focuses faster.

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"Okay, let's get ready ......3,2,1,0!"

"<>2 was 1.4 seconds faster."

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 <>1's <> (mechanical transformation) was 3.1 seconds, <>2's <> (magical transformation) was Reiko reported that it focused on the target in 1.7 seconds.

"That's pretty good for a prototype."

 However, mechanical deformation still takes time, Jin said to himself.

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"If we make it bigger, the time difference will be even wider. ......"

 This is because the mass of the parts becomes larger. The effect of mass is small for the deformation by magic.

"If you use a lens in addition to a reflector to focus, ...... it is no good, it will deviate from the original intention."

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 <, would be meaningless.



"Then it would be better to design it that way from the beginning."

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"What? Ah, Hannah!

 Jin was startled when a voice suddenly called out to him from behind.

 He turned around to see Hannah. Erza, Saki, and Reinhardt were with him.

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"I heard you were doing something interesting, so I came back from Hale.

 Reinhardt spoke for all of us.

"Huh, this reflector over here is the shell of a gigantopod, isn't it? Yes, that's an interesting way to use it.

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"You're going to donate one of these to , aren't you? At least the technology."

"...... maybe, along with the materials we got the other day."

 Everyone seemed to know what was going on.

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 Jin nodded, "That's quick," he said.

"That's right. I'm thinking of putting one on the and the other on the .

 I'm thinking of using it for deus ex machina," Jin explained.

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"So the only room for improvement is in software, not hardware?"

 Elsa pointed out the policy.

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"That's what I'm thinking."

 In that sense, Jin was honestly grateful that Elsa and Hanna had come.

 Jin himself was aware that he was more of a hardware-oriented engineer.

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"Onii-chan, have you tried to analyze the operation?"

"Of course. The most time consuming part is the deformation of the reflector. Next is the distance measurement.

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That's a reasonable line, isn't it?

 Hannah joins in the discussion.

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 Saki is Saki,

"Yes, I like the idea of using the shell of a gigantopod here!

 Saki is examining the prototype that Jin has made.

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"Hmmm......<> is good, but I can't do anything about the mechanical deformation. ......"

 Reinhardt wonders if there is anything that can be done about mechanical deformation.

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"The slow ones are probably a matter of mass first."

 Jin is using light silver to increase strength and reduce weight.

"It's hard to go any further here. ......"

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 If we work out the details, we can probably reduce the weight by a few percent, but that's not a dramatic improvement," he says.

If so, is it a deformation mechanism?

Hmm, reasonable.

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 Erza and Reinhardt were considering this.



"Well, ...... but I still don't think it's the right way to adjust the reflector by deforming it. ......"

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 Hannah muttered with an unconvinced look on her face.

"I think it would be better to keep the reflector as it is, add a lens and move it back and forth. ......"

"I know what you mean. But it's going to be heavy, right?"

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 The prototype is one meter in diameter, which is fine, but in reality, Jin said, if it were five to ten meters, the diameter of the lens would be about the same, which would increase the weight considerably.

"I understand what you say, Onii-chan. But what would be the problem with the increased weight?"

"What?"

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"If it's going to be mounted on a ship, I don't think that kind of weight increase will be a problem, and I think that's the direction we're headed: ......."

 Hannah's opinion made Jin feel a little inclined to agree with her.

"Maybe so,...... considering the range, it won't be a thick lens,...... but my concern is,......"

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 Glass is a reasonably heavy material.

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 Even if the thickness of the glass is about 2 cm, it is quite heavy when it is 5 meters in diameter.

 Assuming a constant thickness of glass, a diameter of 5 meters, a thickness of 2 centimeters, and a specific gravity of 2.5, the weight of the glass would be about 98 The specific gravity of crystal glass is about 3.

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 If the specific gravity of crystal glass is about 3, the weight would exceed 1 ton.

 Jin thought that such a huge piece of glass would be distorted by its own weight, and the error would be large.


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"Hmm, I see. ......"

 Hannah seemed to agree with Jin's explanation.

 There was a way to use cubic zirconia instead of glass, but it would be fine for Horai Island, but not suitable for transferring the technology to <>.

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 As it was, they were at a loss.



"What about an air lens using a boundary?

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 Seeing Jin in distress, Erza gave him some advice.

"Well, that would be the best.


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 Air also changes its refractive index as its density changes.

 This is what causes shimmering lights and mirages.

 For example, if air is enclosed within a convex lens-like boundary and compressed, an air lens is created.

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"Considering the cost and technology, I guess this is the only way. ......"

"Yes, Onii-chan, Erza-chan is right."

 Hannah agreed, and Jin began to seriously consider the method.

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"Is a spherical boundary sufficient?"

 The change in refractive index due to the difference in air density is very small.

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 For example, the refractive index of air at 0 degrees Celsius and 1 atmosphere is 1.00029 At 1 degree Celsius, it is about 1.000270.

 The refractive index of glass is 1.4585 and that of diamond is 2.41. The refractive index of glass is 1.4585 and that of diamond is 2.4195.

 Note that the <> refers to visible light, not sound waves.

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 Since the refractive index is so small, Jin came up with the idea of using the air in a spherical boundary as a lens, instead of the so-called <>.

 Incidentally, the lens in the eye of an underwater fish is spherical, and unlike humans, it is moved back and forth to adjust the focus.

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"Let's try it out and decide how much lens we should use.

 Thus, Jin worked with Erza, Hanna, Saki, Reinhardt, and others to build the second prototype.

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