# Real Ray Metrics

### RMS Spot Radius (Real Rays)

**Details Coming soon**

### Sagittal RMS Spot Radius (Real Rays)

**Details Coming soon**

### Tangential RMS Spot Radius (Real Rays)

**Details Coming soon**

### Geometric Spot Radius (Real Rays)

**Details Coming soon**

### Sagittal Geometric Spot Radius (Real Rays)

**Details Coming soon**

### Tangential Geometric Spot Radius (Real Rays)

**Details Coming soon**

### Astigmatism + Petzval (Real Rays)

**Details Coming soon**

### Axial Color (Real Rays)

**Details Coming soon**

### Distortion (Real Rays)

**Details Coming soon**

### Centroid Distortion (Real Rays)

**Details Coming soon**

### Exit Pupil Location (Real Rays)

**Details Coming soon**

### Reference Sphere Radius (Real Rays)

**Details Coming soon**

### Chief Distortion vs Field (Real Rays)

**Details Coming soon**

### RMS vs Field (Real Rays)

**Details Coming soon**&#x20;

### Encircled Energy (Real Rays)

**Details Coming soon**

### Ensquared Energy (Real Rays)

**Details Coming soon**

### Number Vignetted Rays (Real Rays)

**Details Coming soon**

### Number Failed Fields (Real Rays)

**Details Coming soon**

### Transmission (Real Rays)

**Details Coming soon**

### Statistical Effective Focal Length (Real Rays)

**Details Coming soon.**

### Statistical Sagittal Effective Focal Length (Real Rays)

**Details Coming soon**

### Statistical Tangential Effective Focal Length (Real Rays)

**Details Coming soon**

### Statistical Back Focal Distance (Real Rays)

**Details Coming soon.**

### Statistical Sagittal Back Focal Distance (Real Rays)

**Details Coming soon**

### Statistical Tangential Back Focal Distance (Real Rays)

**Details Coming soon**


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.kostacloud.com/optimization/imaging-optimization/real-ray-metrics.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
